標(biao)準(zhun)化(hua)的(de)(de)(de)(de)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)主(zhu)要是(shi)(shi)0mA~10mA和4mA~20mA（或1V~5V）的(de)(de)(de)(de)直(zhi)流(liu)(liu)信(xin)號(hao)。不(bu)排除其(qi)他(ta)有(you)(you)特(te)殊(shu)規定(ding)的(de)(de)(de)(de)標(biao)準(zhun)化(hua)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)。溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)按供(gong)電(dian)(dian)(dian)(dian)接(jie)線(xian)(xian)(xian)方(fang)式(shi)可(ke)分為(wei)(wei)兩線(xian)(xian)(xian)制(zhi)(zhi)(zhi)和四線(xian)(xian)(xian)制(zhi)(zhi)(zhi)，區別(bie)(bie)在于RWB溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)為(wei)(wei)三線(xian)(xian)(xian)制(zhi)(zhi)(zhi)。隔(ge)離式(shi)溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)變(bian)(bian)送(song)(song)(song)器(qi)(qi)包括(kuo)電(dian)(dian)(dian)(dian)氣單元組(zu)合(he)儀表(biao)系列(lie)、小(xiao)型化(hua)模塊(kuai)型和多功能智能型。前(qian)者(zhe)不(bu)帶(dai)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)，后兩種(zhong)變(bian)(bian)送(song)(song)(song)器(qi)(qi)可(ke)以方(fang)便地與熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)或熱(re)電(dian)(dian)(dian)(dian)阻(zu)組(zu)合(he)，構(gou)成帶(dai)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)的(de)(de)(de)(de)變(bian)(bian)送(song)(song)(song)器(qi)(qi)。變(bian)(bian)送(song)(song)(song)器(qi)(qi)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)與溫度(du)變(bian)(bian)量(liang)之間存在給定(ding)的(de)(de)(de)(de)連續(xu)函數(shu)(shu)關系（通常為(wei)(wei)線(xian)(xian)(xian)性(xing)函數(shu)(shu)），變(bian)(bian)送(song)(song)(song)器(qi)(qi)前(qian)期產生(sheng)的(de)(de)(de)(de)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)與電(dian)(dian)(dian)(dian)阻(zu)值（或電(dian)(dian)(dian)(dian)壓(ya)值）呈線(xian)(xian)(xian)性(xing)函數(shu)(shu)關系）的(de)(de)(de)(de)溫度(du)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)。標(biao)準(zhun)化(hua)的(de)(de)(de)(de)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)主(zhu)要是(shi)(shi)0mA~10mA和4mA~20mA（或1V~5V）的(de)(de)(de)(de)直(zhi)流(liu)(liu)信(xin)號(hao)。不(bu)排除其(qi)他(ta)有(you)(you)特(te)殊(shu)規定(ding)的(de)(de)(de)(de)標(biao)準(zhun)化(hua)輸(shu)(shu)出(chu)(chu)(chu)信(xin)號(hao)。溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)按供(gong)電(dian)(dian)(dian)(dian)接(jie)線(xian)(xian)(xian)方(fang)式(shi)可(ke)分為(wei)(wei)兩線(xian)(xian)(xian)制(zhi)(zhi)(zhi)和四線(xian)(xian)(xian)制(zhi)(zhi)(zhi)，區別(bie)(bie)在于RWB溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)為(wei)(wei)三線(xian)(xian)(xian)制(zhi)(zhi)(zhi)。隔(ge)離式(shi)溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)變(bian)(bian)送(song)(song)(song)器(qi)(qi)包括(kuo)電(dian)(dian)(dian)(dian)氣單元組(zu)合(he)儀表(biao)系列(lie)、小(xiao)型化(hua)模塊(kuai)型和多功能智能型。前(qian)者(zhe)不(bu)帶(dai)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)，后兩種(zhong)變(bian)(bian)送(song)(song)(song)器(qi)(qi)可(ke)以方(fang)便地與熱(re)電(dian)(dian)(dian)(dian)偶(ou)(ou)或熱(re)電(dian)(dian)(dian)(dian)阻(zu)組(zu)合(he)，構(gou)成帶(dai)傳(chuan)(chuan)感(gan)(gan)器(qi)(qi)的(de)(de)(de)(de)變(bian)(bian)送(song)(song)(song)器(qi)(qi)。變(bian)(bian)送(song)(song)(song)器(qi)(qi)常用來測(ce)量(liang)壓(ya)力(li)、差壓(ya)、真空、液位、流(liu)(liu)量(liang)和密度(du)等。南京直(zhi)流(liu)(liu)溫度(du)變(bian)(bian)送(song)(song)(song)器(qi)(qi)代加工

熱電(dian)(dian)阻溫(wen)度(du)(du)(du)變(bian)(bian)送器(qi)(qi)主要是利用熱電(dian)(dian)阻的(de)阻值隨溫(wen)度(du)(du)(du)變(bian)(bian)化而變(bian)(bian)化的(de)特點，將熱電(dian)(dian)阻信號(hao)(hao)(hao)(hao)經線性處理后轉(zhuan)換成4-20mA、0-5V等(deng)標準工(gong)(gong)業(ye)信號(hao)(hao)(hao)(hao)輸(shu)出(chu)(chu)(chu)(chu)。熱電(dian)(dian)阻溫(wen)度(du)(du)(du)變(bian)(bian)送器(qi)(qi)有一進一出(chu)(chu)(chu)(chu)和一進二出(chu)(chu)(chu)(chu)可供選(xuan)擇，在數據采集、信號(hao)(hao)(hao)(hao)傳(chuan)輸(shu)、信號(hao)(hao)(hao)(hao)轉(zhuan)換、PLC、DCS等(deng)工(gong)(gong)業(ye)測控系(xi)(xi)統中均(jun)被廣泛(fan)應用，用來完善和補充(chong)系(xi)(xi)統模(mo)擬I/O插件功能(neng)(neng)，提高(gao)系(xi)(xi)統的(de)穩定性和抗干擾能(neng)(neng)力(li)。XP系(xi)(xi)列(lie)熱電(dian)(dian)阻溫(wen)度(du)(du)(du)變(bian)(bian)送器(qi)(qi)采用ABS阻燃材料的(de)外(wai)殼(ke)，其(qi)外(wai)形(xing)尺寸是122mm×18mm×96mm，機殼(ke)厚(hou)度(du)(du)(du)而為(wei)18mm，且儀表兩(liang)端(duan)含有通風柵(zha)格的(de)設計(ji)，因此非(fei)常適合密集安裝。（1）工(gong)(gong)作電(dian)(dian)源(yuan)：DC24V±10%（反向保護）；AC220V（2）輸(shu)入信號(hao)(hao)(hao)(hao)：Cu50、Pt100、Cu100、Pt1000、Ni1000等(deng)（3）輸(shu)出(chu)(chu)(chu)(chu)信號(hao)(hao)(hao)(hao)：直(zhi)流(liu)電(dian)(dian)流(liu)或電(dian)(dian)壓信號(hao)(hao)(hao)(hao)（4）輸(shu)出(chu)(chu)(chu)(chu)負載：電(dian)(dian)壓輸(shu)出(chu)(chu)(chu)(chu)≥10KΩ，電(dian)(dian)流(liu)輸(shu)出(chu)(chu)(chu)(chu)0~350Ω（5）溫(wen)度(du)(du)(du)漂移：±150PPM/℃電(dian)(dian)流(liu)溫(wen)度(du)(du)(du)變(bian)(bian)送器(qi)(qi)價格優惠(hui)溫(wen)度(du)(du)(du)變(bian)(bian)送器(qi)(qi)參數影(ying)響因素是什么？

溫(wen)(wen)度變送(song)器(qi)在(zai)測(ce)(ce)溫(wen)(wen)中(zhong)的(de)(de)作(zuo)用熱(re)電(dian)(dian)(dian)(dian)偶(ou)的(de)(de)毫伏信(xin)(xin)號(hao)和熱(re)電(dian)(dian)(dian)(dian)阻(zu)(zu)的(de)(de)阻(zu)(zu)值變化(hua)信(xin)(xin)號(hao)由溫(wen)(wen)度變送(song)器(qi)轉(zhuan)(zhuan)換(huan)成(cheng)(cheng)(cheng)統一(yi)(yi)的(de)(de)電(dian)(dian)(dian)(dian)流信(xin)(xin)號(hao)輸入(ru)顯示和記錄儀表可作(zuo)為自動(dong)(dong)溫(wen)(wen)度檢測(ce)(ce)輸入(ru)調(diao)節器(qi)組成(cheng)(cheng)(cheng)自動(dong)(dong)調(diao)節系統，用于自動(dong)(dong)溫(wen)(wen)度調(diao)節。經(jing)(jing)(jing)(jing)轉(zhuan)(zhuan)換(huan)輸入(ru)電(dian)(dian)(dian)(dian)子(zi)計(ji)算(suan)機后，可進行溫(wen)(wen)度電(dian)(dian)(dian)(dian)路檢測(ce)(ce)、計(ji)算(suan)機控(kong)制等。度變送(song)器(qi)由基準(zhun)單元(yuan)、R/V轉(zhuan)(zhuan)換(huan)單元(yuan)、線性(xing)電(dian)(dian)(dian)(dian)路、反極性(xing)保護、限流保護、V/I轉(zhuan)(zhuan)換(huan)單元(yuan)等組成(cheng)(cheng)(cheng)。測(ce)(ce)溫(wen)(wen)熱(re)電(dian)(dian)(dian)(dian)阻(zu)(zu)信(xin)(xin)號(hao)經(jing)(jing)(jing)(jing)過(guo)轉(zhuan)(zhuan)換(huan)放大后，與溫(wen)(wen)度和電(dian)(dian)(dian)(dian)阻(zu)(zu)經(jing)(jing)(jing)(jing)線性(xing)電(dian)(dian)(dian)(dian)路補償，經(jing)(jing)(jing)(jing)過(guo)V/I轉(zhuan)(zhuan)換(huan)電(dian)(dian)(dian)(dian)路后，輸出與被測(ce)(ce)溫(wen)(wen)度成(cheng)(cheng)(cheng)線性(xing)關系的(de)(de)4～20mA恒流信(xin)(xin)號(hao)。.一(yi)(yi)體式溫(wen)(wen)度變送(song)器(qi)一(yi)(yi)般由溫(wen)(wen)度探頭（熱(re)電(dian)(dian)(dian)(dian)偶(ou)或(huo)熱(re)電(dian)(dian)(dian)(dian)阻(zu)(zu)傳感器(qi)）和兩線制固態電(dian)(dian)(dian)(dian)子(zi)單元(yuan)組成(cheng)(cheng)(cheng)。測(ce)(ce)溫(wen)(wen)探頭以實(shi)體模塊的(de)(de)形式直接安裝(zhuang)在(zai)接線盒內(nei)，從而形成(cheng)(cheng)(cheng)一(yi)(yi)體化(hua)變送(song)器(qi)。集成(cheng)(cheng)(cheng)溫(wen)(wen)度變送(song)器(qi)一(yi)(yi)般分為熱(re)電(dian)(dian)(dian)(dian)阻(zu)(zu)和熱(re)電(dian)(dian)(dian)(dian)偶(ou)兩種。

在大多數情況下，對溫(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)的(de)(de)選(xuan)(xuan)用，需(xu)考慮以(yi)下幾個方面(mian)的(de)(de)問題：1、被測(ce)(ce)(ce)對象的(de)(de)溫(wen)度(du)(du)(du)是(shi)否(fou)需(xu)記錄、報警和(he)自動控制，是(shi)否(fou)需(xu)要遠距離(li)測(ce)(ce)(ce)量和(he)傳送(song)。2、測(ce)(ce)(ce)溫(wen)范(fan)(fan)(fan)(fan)圍的(de)(de)大小和(he)精度(du)(du)(du)要求(qiu)。3、測(ce)(ce)(ce)溫(wen)元件(jian)大小是(shi)否(fou)適(shi)當。4、在被測(ce)(ce)(ce)對象溫(wen)度(du)(du)(du)隨時間變(bian)(bian)(bian)化(hua)(hua)的(de)(de)場合(he)，測(ce)(ce)(ce)溫(wen)元件(jian)的(de)(de)滯后能否(fou)適(shi)應(ying)測(ce)(ce)(ce)溫(wen)要求(qiu)。5、被測(ce)(ce)(ce)對象的(de)(de)環境條件(jian)對測(ce)(ce)(ce)溫(wen)元件(jian)是(shi)否(fou)有損害(hai)。溫(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)的(de)(de)選(xuan)(xuan)擇主要是(shi)根據測(ce)(ce)(ce)量范(fan)(fan)(fan)(fan)圍，當測(ce)(ce)(ce)量范(fan)(fan)(fan)(fan)圍預計在總量程之內，可選(xuan)(xuan)用鉑(bo)電(dian)(dian)阻變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)，較窄的(de)(de)量程通常要求(qiu)變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)必須具(ju)有相當高的(de)(de)基本(ben)電(dian)(dian)阻，以(yi)便獲(huo)得(de)(de)足(zu)夠大的(de)(de)電(dian)(dian)阻變(bian)(bian)(bian)化(hua)(hua)。熱(re)(re)敏(min)電(dian)(dian)阻所提(ti)供的(de)(de)足(zu)夠大的(de)(de)電(dian)(dian)阻變(bian)(bian)(bian)化(hua)(hua)使得(de)(de)這些(xie)敏(min)感元件(jian)非常適(shi)用于(yu)窄的(de)(de)測(ce)(ce)(ce)量范(fan)(fan)(fan)(fan)圍。如果測(ce)(ce)(ce)量范(fan)(fan)(fan)(fan)圍相當大時，熱(re)(re)電(dian)(dian)偶(ou)更適(shi)用。比(bi)較好(hao)將冰點也(ye)包(bao)括在此范(fan)(fan)(fan)(fan)圍內，因為熱(re)(re)電(dian)(dian)偶(ou)的(de)(de)分度(du)(du)(du)表是(shi)以(yi)此溫(wen)度(du)(du)(du)為基準的(de)(de)。已知(zhi)范(fan)(fan)(fan)(fan)圍內的(de)(de)變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)線性也(ye)可作為選(xuan)(xuan)擇變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)的(de)(de)附加條件(jian)。溫(wen)度(du)(du)(du)變(bian)(bian)(bian)送(song)器(qi)(qi)(qi)(qi)不易受寄生熱(re)(re)電(dian)(dian)偶(ou)和(he)沿電(dian)(dian)線電(dian)(dian)阻壓降和(he)溫(wen)漂的(de)(de)影響，傳輸線可用非常便宜的(de)(de)更細的(de)(de)雙絞線導(dao)線。

按(an)照測(ce)量(liang)方式(shi)可(ke)(ke)將其分為接(jie)觸式(shi)和非接(jie)觸式(shi)兩大(da)類，在(zai)實際使用(yong)(yong)上通常會和一(yi)些(xie)儀(yi)表配套使用(yong)(yong)，但也會出(chu)(chu)(chu)(chu)現(xian)很(hen)多(duo)故障現(xian)象。首先，被測(ce)介質溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度升高或者降低時(shi)(shi)(shi)變(bian)(bian)送(song)(song)(song)器(qi)輸出(chu)(chu)(chu)(chu)沒(mei)有(you)變(bian)(bian)化，這(zhe)種(zhong)情(qing)(qing)況(kuang)大(da)多(duo)是(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)密封的(de)(de)(de)(de)(de)問題，可(ke)(ke)能(neng)(neng)是(shi)由(you)于(yu)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)沒(mei)有(you)密封好或者是(shi)在(zai)焊接(jie)的(de)(de)(de)(de)(de)時(shi)(shi)(shi)候(hou)(hou)不(bu)(bu)小(xiao)心將傳(chuan)(chuan)感(gan)(gan)器(qi)焊了個小(xiao)洞，這(zhe)種(zhong)情(qing)(qing)況(kuang)一(yi)般(ban)需要更換傳(chuan)(chuan)感(gan)(gan)器(qi)外殼才能(neng)(neng)解決。第二，輸出(chu)(chu)(chu)(chu)信號不(bu)(bu)穩(wen)定，這(zhe)種(zhong)原因是(shi)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度源本(ben)(ben)身的(de)(de)(de)(de)(de)原因，溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度源本(ben)(ben)身就是(shi)一(yi)個不(bu)(bu)穩(wen)定的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度，如果是(shi)儀(yi)表顯示(shi)不(bu)(bu)穩(wen)定，那就是(shi)儀(yi)表的(de)(de)(de)(de)(de)抗(kang)干擾(rao)能(neng)(neng)力(li)不(bu)(bu)強(qiang)的(de)(de)(de)(de)(de)原因。第三，變(bian)(bian)送(song)(song)(song)器(qi)輸出(chu)(chu)(chu)(chu)誤差大(da)，這(zhe)種(zhong)情(qing)(qing)況(kuang)原因就比較多(duo)，可(ke)(ke)能(neng)(neng)是(shi)選用(yong)(yong)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)的(de)(de)(de)(de)(de)電阻絲(si)不(bu)(bu)對導致量(liang)程錯誤，也有(you)可(ke)(ke)能(neng)(neng)是(shi)變(bian)(bian)送(song)(song)(song)器(qi)出(chu)(chu)(chu)(chu)廠的(de)(de)(de)(de)(de)時(shi)(shi)(shi)候(hou)(hou)沒(mei)有(you)標定好。溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)出(chu)(chu)(chu)(chu)現(xian)故障的(de)(de)(de)(de)(de)情(qing)(qing)況(kuang)很(hen)少(shao)見，只要出(chu)(chu)(chu)(chu)廠的(de)(de)(de)(de)(de)時(shi)(shi)(shi)候(hou)(hou)進行仔細的(de)(de)(de)(de)(de)檢(jian)測(ce)，這(zhe)些(xie)情(qing)(qing)況(kuang)都(dou)是(shi)可(ke)(ke)以避免(mian)的(de)(de)(de)(de)(de)，所以溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)在(zai)出(chu)(chu)(chu)(chu)廠的(de)(de)(de)(de)(de)時(shi)(shi)(shi)候(hou)(hou)一(yi)定要進行檢(jian)驗(yan)，客(ke)戶也可(ke)(ke)找變(bian)(bian)送(song)(song)(song)器(qi)廠家索(suo)要出(chu)(chu)(chu)(chu)廠檢(jian)測(ce)報告(gao)進行參考。溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)主(zhu)要用(yong)(yong)于(yu)工業(ye)過程溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度參數的(de)(de)(de)(de)(de)測(ce)量(liang)和控制。湖北有(you)源溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)度變(bian)(bian)送(song)(song)(song)器(qi)廠家直(zhi)銷(xiao)

溫(wen)度變送器除(chu)了能將(jiang)非電(dian)量轉換成可測量的電(dian)量之外，一般來(lai)說還具(ju)有(you)一定的放大(da)作用。南京直流溫(wen)度變送器代加工

采用熱(re)電(dian)(dian)偶、熱(re)電(dian)(dian)阻(zu)作(zuo)為(wei)測溫(wen)元件。溫(wen)度傳(chuan)感器(qi)是(shi)一(yi)種通過(guo)電(dian)(dian)信號(hao)提供溫(wen)度測量的(de)(de)(de)(de)設備。傳(chuan)感器(qi)由兩種金屬組(zu)(zu)成(cheng)(cheng)，一(yi)旦發現溫(wen)度變化(hua)，它們就(jiu)會產生電(dian)(dian)壓或(huo)電(dian)(dian)阻(zu)。它能夠受規定(ding)的(de)(de)(de)(de)被測量并按照一(yi)定(ding)的(de)(de)(de)(de)規律轉(zhuan)換(huan)(huan)成(cheng)(cheng)可用輸(shu)出信號(hao)的(de)(de)(de)(de)器(qi)件或(huo)裝置的(de)(de)(de)(de)總稱，通常由敏(min)感元件和轉(zhuan)換(huan)(huan)元件組(zu)(zu)成(cheng)(cheng)。當傳(chuan)感器(qi)的(de)(de)(de)(de)輸(shu)出為(wei)規定(ding)的(de)(de)(de)(de)標(biao)準信號(hao)時，則(ze)稱為(wei)變送(song)器(qi)。溫(wen)度變送(song)器(qi)采用熱(re)電(dian)(dian)偶、熱(re)電(dian)(dian)阻(zu)作(zuo)為(wei)測溫(wen)元件，從測溫(wen)元件輸(shu)出信號(hao)送(song)到變送(song)器(qi)模塊，經(jing)過(guo)穩壓濾波、運算放大、非線性校(xiao)正、V/I轉(zhuan)換(huan)(huan)、恒流及反向(xiang)保護等電(dian)(dian)路處理(li)后，轉(zhuan)換(huan)(huan)成(cheng)(cheng)與溫(wen)度成(cheng)(cheng)線性關系的(de)(de)(de)(de)4～20mA電(dian)(dian)流信號(hao)輸(shu)出。南京直流溫(wen)度變送(song)器(qi)代加(jia)工

南京緯鈦(tai)儀表(biao)科(ke)技有限(xian)公(gong)(gong)司(si)在智能(neng)溫度(du)變送器，頻(pin)率(lv)變速器，通訊隔離器，多通道(dao)隔離器一直在同(tong)行業中處(chu)于(yu)(yu)較強地位，無論是(shi)產(chan)品還是(shi)服務(wu)，其高水(shui)(shui)平的(de)能(neng)力(li)始終貫(guan)穿于(yu)(yu)其中。公(gong)(gong)司(si)成立(li)于(yu)(yu)2020-11-12，旗下緯鈦(tai)，已經(jing)具有一定的(de)業內水(shui)(shui)平。公(gong)(gong)司(si)承(cheng)擔并建設(she)完成儀器儀表(biao)多項(xiang)重點項(xiang)目，取得了明(ming)顯的(de)社會和經(jing)濟(ji)效益。產(chan)品已銷(xiao)往(wang)多個國家和地區，被國內外眾多企業和客(ke)戶所認可。

本文來自廣西(xi)桂林百利(li)種苗有限公司：//a777a.cn/Article/497a7099432.html