直接測(ce)數(shu)法是(shi)憑借(jie)照布(bu)(bu)鏡或織(zhi)物(wu)密度(du)(du)分析(xi)鏡來完成(cheng)。織(zhi)物(wu)密度(du)(du)分析(xi)鏡的(de)刻度(du)(du)尺(chi)長(chang)度(du)(du)為5cm,在分析(xi)鏡頭下面(mian),一塊長(chang)條形玻璃片上刻有一條紅線(xian), 全棉(mian)印花帆(fan)布(bu)(bu),純棉(mian)帆(fan)布(bu)(bu),顧名思義,就是(shi)100%的(de)棉(mian)織(zhi)物(wu)了,棉(mian)織(zhi)物(wu)的(de)優點是(shi)吸(xi)濕性強(qiang),染色性能好,手感柔軟,穿著舒適,外觀(guan)樸素,不易蟲(chong)蛀(zhu),堅牢耐用;其(qi)缺點就是(shi)快干性能...