直(zhi)接測數法是(shi)憑借照布鏡或(huo)織物(wu)密度(du)分析(xi)鏡來完(wan)成。織物(wu)密度(du)分析(xi)鏡的刻度(du)尺長度(du)為(wei)5cm,在(zai)分析(xi)鏡頭下(xia)面,一(yi)塊長條(tiao)形玻璃片上(shang)刻有一(yi)條(tiao)紅線(xian), 棉(mian)(mian)帆布 就是(shi)棉(mian)(mian)線(xian)布 俗稱CC56,還有聚(ju)酯(zhi)輸送(song)(song)(song)帶(dai)(dai)、尼龍(long)輸送(song)(song)(song)帶(dai)(dai)、相比(bi)棉(mian)(mian)帆布輸送(song)(song)(song)帶(dai)(dai)拉力(li)大。棉(mian)(mian)帆布輸送(song)(song)(song)帶(dai)(dai),適用于短距離、載量中(zhong)等(deng)條(tiao)件(jian)下(xia)輸送(song)(song)(song)物(wu)料,拉力(li)比(bi)較低,承重有一(yi)定的...