直接(jie)測數法(fa)是憑借(jie)照(zhao)布鏡(jing)或織物(wu)(wu)密度(du)(du)分(fen)析鏡(jing)來完成。織物(wu)(wu)密度(du)(du)分(fen)析鏡(jing)的刻度(du)(du)尺長(chang)度(du)(du)為5cm,在分(fen)析鏡(jing)頭(tou)下(xia)面,一(yi)塊長(chang)條形玻璃(li)片上刻有一(yi)條紅線, 輸送帶用(yong)(yong)(yong)纖維織物(wu)(wu)作帶芯(xin),用(yong)(yong)(yong)一(yi)般(ban)橡(xiang)膠作覆蓋材料,表(biao)面光滑平整(zheng)。棉纖維是應用(yong)(yong)(yong)最早的帶芯(xin)材料,易與橡(xiang)膠粘合,濕態時(shi)強度(du)(du)略(lve)有提高,但破斷強度(du)(du)低〔大多在56牛/(毫(hao)米·層)...