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摘 要(yao) :在火(huo)線和(he)地線之(zhi)間(jian)以(yi)(yi)及在零(ling)線和(he)地線之(zhi)間(jian)并(bing)接(jie)的電(dian)容(rong),一般統稱為獨石(shi)電(dian)容(rong)器(qi)。 這兩個獨石(shi)電(dian)容(rong)器(qi)連接(jie)的位置比(bi)較(jiao)(jiao)關(guan)鍵,必須需(xu)要(yao)符(fu)合(he)相關(guan)安(an)全(quan)標準, 以(yi)(yi)防(fang)引(yin)起(qi)電(dian)子設備漏電(dian)或機殼帶電(dian),容(rong)易危及人身安(an)全(quan)及生命。它們都屬于安(an)全(quan)電(dian)容(rong),從(cong)而要(yao)求電(dian)容(rong)值不(bu)能偏大,而耐壓必須較(jiao)(jiao)高。一般情況(kuang)下(xia),工作在亞(ya)熱帶的機
2020-12-20 -
摘 要 :(1)、潮濕(shi)對電(dian)(dian)參數(shu)惡化的影(ying)響(xiang) 空氣中濕(shi)度過高時,水(shui)膜凝聚在電(dian)(dian)容(rong)(rong)器(qi)(qi)外殼表(biao)(biao)面,可使電(dian)(dian)容(rong)(rong)器(qi)(qi)的表(biao)(biao)面絕緣電(dian)(dian)阻下降.此處,對于(yu)半密封結構電(dian)(dian)容(rong)(rong)器(qi)(qi)來(lai)說,水(shui)分還可滲(shen)透(tou)到電(dian)(dian)容(rong)(rong)器(qi)(qi)介質內部,使電(dian)(dian)容(rong)(rong)器(qi)(qi)介質的絕緣電(dian)(dian)阻絕緣能力(li)下降.因此,高溫、高濕(shi)環境對電(dian)(dian)容(rong)(rong)器(qi)(qi)參數(shu)惡化的影(ying)響(xiang)極為(wei)顯(xian)著.經烘干去濕(shi)后(hou)電(dian)(dian)
2020-12-20 -
摘 要(yao) :首先,要(yao)清楚什么是(shi)獨石(shi)(shi)電(dian)(dian)容(rong)器(qi)。既然稱之為 “ 電(dian)(dian)容(rong)器(qi)”,就應(ying)該(gai)是(shi)物理過程存(cun)儲(chu)電(dian)(dian)荷, 而不是(shi)依靠電(dian)(dian)化(hua)學過程存(cun)儲(chu)電(dian)(dian)荷。在這個基(ji)本概(gai)念下,純(chun)雙電(dian)(dian)層原理的獨石(shi)(shi)電(dian)(dian)容(rong)器(qi)是(shi)真正(zheng)的 電(dian)(dian)容(rong)器(qi);電(dian)(dian)化(hua)學電(dian)(dian)容(rong)器(qi)是(shi)否可(ke)以稱為電(dian)(dian)容(rong)器(qi)則需要(yao)分(fen)析。電(dian)(dian)化(hua)學獨石(shi)(shi)電(dian)(dian)容(rong)器(qi)應(ying)分(fen)為兩類(lei),如 果是(shi)一雙電(dian)(dian)層原理占主(zhu)要(yao)電(dian)(dian)荷(或能
2020-12-20 -
摘(zhai) 要 :有(you)陰極(ji)陽極(ji)之分的(de)(de)(de)獨(du)(du)石電(dian)容(rong)器,為了能夠(gou)承受規定的(de)(de)(de)電(dian)壓(ya)(ya),而(er)強制性(xing)(xing)地(di)進(jin)行化成(cheng)處(chu)理(li);獨(du)(du)石電(dian)容(rong)器由于沒有(you)這種(zhong)處(chu)理(li),所(suo)以本質上沒有(you)耐壓(ya)(ya)性(xing)(xing)。但是,由于鋁是活(huo)性(xing)(xing)金屬與空氣中(zhong)的(de)(de)(de)氧氣產生化學反(fan)應,會自(zi)然形成(cheng)酸化皮(pi)膜(mo),由于這個皮(pi)膜(mo)的(de)(de)(de)作用,在常溫中(zhong)也(ye)會有(you)1~1.5V的(de)(de)(de)耐壓(ya)(ya)能力。由于這種(zhong)皮(pi)膜(mo)的(de)(de)(de)不均(jun)一性(xing)(xing)和不
2020-12-20 -
摘 要 :藥用鋁(lv)(lv)管(guan)可分為軟質鋁(lv)(lv)管(guan)和硬(ying)質鋁(lv)(lv)罐兩(liang)種。軟質鋁(lv)(lv)管(guan)也稱為“軟管(guan)”,是經過軟化處理,用于包裝霜(shuang)劑、油膏劑、眼藥膏等劑型(xing)的(de)容(rong)器(qi)(qi),而硬(ying)質鋁(lv)(lv)罐則是未經軟化處理的(de)、用于包裝如泡騰(teng)片(pian)、藥片(pian)、膠囊、噴霧劑等劑型(xing)的(de)容(rong)器(qi)(qi)。該兩(liang)類(lei)容(rong)器(qi)(qi)均(jun)用純鋁(lv)(lv)鋁(lv)(lv)制品(pin)作(鋁(lv)(lv)含(han)量不得低于99.5%),鋁(lv)(lv)材(cai)來源廣,具有金屬所特
2020-12-20 -
摘 要 :故宮博物院復(fu)制(zhi)《清明上(shang)河圖》, 用(yong)的(de)(de)(de)顏料就是從我(wo)這里買的(de)(de)(de) 問:聽說蘇(su)州(zhou)(zhou)制(zhi)作(zuo)國(guo)畫(hua)顏料的(de)(de)(de)歷(li)史(shi)很(hen)早,究(jiu)竟早到什么(me)時候呢? 答:早在清乾隆(long)年間(jian),就能在《姑蘇(su)繁華(hua)圖》上(shang)找(zhao)到“朱砂”丹粉(fen)”的(de)(de)(de)店招。蘇(su)州(zhou)(zhou)姜思序堂是我(wo)國(guo)“創立最早、歷(li)史(shi)最久、知名(ming)度最高的(de)(de)(de)國(guo)畫(hua)顏料生產作(zuo)坊之一,其國(guo)畫(hua)顏料
2020-12-20 -
摘 要 :自從(cong)1840年法國人(ren)用(yong)(yong)錫制成第(di)一只包(bao)裝繪(hui)畫顏料的(de)(de)軟(ruan)管(guan)以(yi)來,第(di)一次大戰中出(chu)現包(bao)錫鉛管(guan),1948年出(chu)現鋁(lv)管(guan)。過去(qu)傳(chuan)統(tong)的(de)(de)軟(ruan)管(guan)包(bao)裝用(yong)(yong)的(de)(de)軟(ruan)質(zhi)金屬,如:錫、鉛、鋁(lv)等,金屬有不(bu)耐(nai)腐蝕(shi)、質(zhi)量重的(de)(de)缺點。近(jin)來已逐漸(jian)為塑(su)(su)料軟(ruan)管(guan)所取代。1950年瑞士發明了用(yong)(yong)LDPE做的(de)(de)塑(su)(su)料軟(ruan)管(guan),由于單(dan)一塑(su)(su)料做成的(de)(de)軟(ruan)管(guan),
2020-12-20 -
摘 要 :【】每(mei)天早上起床都要做的(de)一件事就(jiu)是(shi)(shi)刷牙(ya)(ya)(ya)(ya)(ya)。可誰(shui)都不會去(qu)在乎裝牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)的(de)牙(ya)(ya)(ya)(ya)(ya)管(guan)。目(mu)前,中(zhong)(zhong)國牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)產(chan)(chan)量30億(yi)支/年,也就(jiu)是(shi)(shi)說(shuo)有(you)30億(yi)支/年的(de)牙(ya)(ya)(ya)(ya)(ya)管(guan)市(shi)場。溫(wen)嶺市(shi)申華(hua)日化(hua)有(you)限公司,是(shi)(shi)一家專業生產(chan)(chan)牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)鋁(lv)管(guan)及旅游牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)制造企業。 據中(zhong)(zhong)國鋁(lv)業網(wang)記者了(le)解,申華(hua)日化(hua)有(you)限公司主(zhu)要生產(chan)(chan)牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)鋁(lv)管(guan)和旅游牙(ya)(ya)(ya)(ya)(ya)膏(gao)(gao)及鋁(lv)元片(pian)
2020-12-20 -
摘(zhai) 要 :一(yi)個企業僅(jin)有深厚(hou)的(de)(de)文化底蘊是(shi)不夠的(de)(de),還必須擁有適應市場的(de)(de)機制和體制作保證,并通(tong)過(guo)提升(sheng)文化創造力來(lai)發(fa)展企業的(de)(de)核心競爭力 起(qi)源(yuan)于十(shi)股東 我(wo)(wo)是(shi)1979年(nian)進(jin)入(ru)馬(ma)利畫(hua)材工(gong)作的(de)(de)。但(dan)我(wo)(wo)家與馬(ma)利的(de)(de)淵源(yuan)可以(yi)追(zhui)溯到我(wo)(wo)父親(qin),他就(jiu)是(shi)馬(ma)利的(de)(de)職工(gong),那時我(wo)(wo)們家就(jiu)住(zhu)在馬(ma)利的(de)(de)職工(gong)宿舍,周(zhou)圍鄰
2020-12-20 -
摘 要 :1、問:倉儲籠可以使用多(duo)少年? 答:一般(ban)為10年,甚(shen)至可以用20年。 2、問:倉儲籠會不會生銹? 答:我(wo)們采(cai)用三價環保電鍍(du),不易生銹,盡量避(bi)免(mian)與雨(yu)水和潮濕(shi)的地方存放 我(wo)們的質量達到出口(kou)(kou)標準,出口(kou)(kou)到國外不用包塑料膜,可見鍍(du)鋅工藝成
2020-12-20