直接測(ce)數法是憑借照布(bu)鏡或織(zhi)物(wu)密度(du)分析(xi)鏡來完成。織(zhi)物(wu)密度(du)分析(xi)鏡的刻(ke)度(du)尺長度(du)為5cm,在分析(xi)鏡頭下面,一(yi)塊(kuai)長條形(xing)玻(bo)璃片上刻(ke)有(you)一(yi)條紅(hong)線(xian)(xian), 棉帆布(bu) 就(jiu)是棉線(xian)(xian)布(bu) 俗稱CC56,還有(you)聚酯輸(shu)(shu)送(song)帶、尼龍輸(shu)(shu)送(song)帶、相比棉帆布(bu)輸(shu)(shu)送(song)帶拉(la)力(li)大。棉帆布(bu)輸(shu)(shu)送(song)帶,適用于短距離、載量中(zhong)等條件下輸(shu)(shu)送(song)物(wu)料,拉(la)力(li)比較低,承(cheng)重有(you)一(yi)定(ding)的...