直接測數法是憑借照布(bu)鏡(jing)或(huo)織(zhi)物(wu)密(mi)度(du)分(fen)析鏡(jing)來完成。織(zhi)物(wu)密(mi)度(du)分(fen)析鏡(jing)的刻度(du)尺長度(du)為(wei)5cm,在分(fen)析鏡(jing)頭下面,一塊(kuai)長條(tiao)形玻璃片(pian)上刻有(you)一條(tiao)紅線(xian)(xian), 棉帆(fan)布(bu) 就(jiu)是棉線(xian)(xian)布(bu) 俗稱CC56,還有(you)聚(ju)酯輸送(song)帶、尼龍輸送(song)帶、相(xiang)比棉帆(fan)布(bu)輸送(song)帶拉力(li)大。棉帆(fan)布(bu)輸送(song)帶,適用于短距離、載(zai)量中(zhong)等條(tiao)件下輸送(song)物(wu)料,拉力(li)比較(jiao)低,承重有(you)一定(ding)的...