久久精品aⅴ无码中文字字幕重口,蜜桃久久久电影,欧美最猛,日韩天天射

煤礦用阻燃通信電纜(原煤礦用信號(hào)電纜)5＊2＊0.7

fire-retardant communication cables for coal mines(signal electric cable)


煤礦用阻燃通信電纜(原煤礦用信號(hào)電纜)520.7產(chǎn)品用途:產(chǎn)品適用于煤礦井下監(jiān)測(cè)、控制系統(tǒng)作低頻信號(hào)傳輸線。

scope of application:the product is suitable for the coal mine mine shaft monitor, the control system makes the low-frequency signal transmission line

執(zhí)行標(biāo)準(zhǔn) standards implemented: q/3210hl07-2005

型號(hào)名稱及使用范圍 model desc-riptions and use scope 型 號(hào)