直接測數法是憑借照布鏡(jing)(jing)或織(zhi)物密度(du)(du)分析(xi)鏡(jing)(jing)來完成。織(zhi)物密度(du)(du)分析(xi)鏡(jing)(jing)的(de)刻(ke)度(du)(du)尺長度(du)(du)為5cm,在分析(xi)鏡(jing)(jing)頭(tou)下面(mian),8安染色(se)全(quan)棉(mian)(mian)帆布 輸送帶用(yong)(yong)纖維織(zhi)物作(zuo)帶芯,用(yong)(yong)一般(ban)橡膠(jiao)作(zuo)覆蓋材料,表面(mian)光滑(hua)平整。棉(mian)(mian)纖維是應用(yong)(yong)最(zui)早(zao)的(de)帶芯材料,易與橡膠(jiao)粘合(he),濕態時強度(du)(du)略有提(ti)高,但破(po)斷(duan)強度(du)(du)低(di)〔大多在56牛/(毫米·層)左(zuo)右(you)〕,防腐防霉...