直(zhi)接測數法是憑借(jie)照布(bu)(bu)鏡(jing)或織(zhi)(zhi)物(wu)密度(du)(du)分析(xi)鏡(jing)來(lai)完成(cheng)。織(zhi)(zhi)物(wu)密度(du)(du)分析(xi)鏡(jing)的刻度(du)(du)尺長度(du)(du)為5cm,在分析(xi)鏡(jing)頭下面,一(yi)塊長條(tiao)形(xing)玻(bo)璃(li)片上刻有一(yi)條(tiao)紅線, 棉(mian)帆布(bu)(bu) 就是棉(mian)線布(bu)(bu) 俗稱CC56,還有聚酯(zhi)輸(shu)送帶、尼(ni)龍輸(shu)送帶、相比(bi)棉(mian)帆布(bu)(bu)輸(shu)送帶拉力大(da)。棉(mian)帆布(bu)(bu)輸(shu)送帶,適用于(yu)短(duan)距離、載(zai)量中等條(tiao)件(jian)下輸(shu)送物(wu)料,拉力比(bi)較(jiao)低,承重有一(yi)定的...