直接測數(shu)法是(shi)憑(ping)借照布鏡或織(zhi)物(wu)密度分析(xi)(xi)鏡來完成(cheng)。織(zhi)物(wu)密度分析(xi)(xi)鏡的刻(ke)(ke)度尺長度為(wei)5cm,在分析(xi)(xi)鏡頭(tou)下面,一塊長條形玻璃片上刻(ke)(ke)有(you)一條紅線(xian), 輸送帶用(yong)(yong)纖(xian)維織(zhi)物(wu)作帶芯,用(yong)(yong)一般橡膠作覆蓋材料,表面光滑(hua)平(ping)整。棉纖(xian)維是(shi)應用(yong)(yong)最(zui)早(zao)的帶芯材料,易與(yu)橡膠粘合(he),濕(shi)態時強(qiang)度略有(you)提高(gao),但破斷強(qiang)度低〔大多在56牛/(毫米·層)...