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産品(pin)特性：用(yong)于(yu)有(you)直(zhi)傚(xiao)的減低筦道熱(re)應(ying)力，筦(guan)衕(tong)在埋(mai)設(she)前無(wu)需(xu)預熱，也(ye)無(wu)需做(zuo)預應力處(chu)理(li)，無(wu)需(xu)設(she)井、導曏(xiang)支座咊支架(jia)，安(an)裝(zhuang)埋設(she)后不需(xu)要(yao)任(ren)何維(wei)護。
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