直(zhi)接測數(shu)法是(shi)(shi)憑借照(zhao)布(bu)鏡或織物(wu)(wu)密度(du)(du)(du)分析鏡來完成。織物(wu)(wu)密度(du)(du)(du)分析鏡的刻度(du)(du)(du)尺(chi)長度(du)(du)(du)為5cm,在分析鏡頭下面,YH2278印花(hua)帆布(bu) 全(quan)棉(mian)(mian)印花(hua)帆布(bu),純(chun)棉(mian)(mian)帆布(bu),顧名思義,就是(shi)(shi)100%的棉(mian)(mian)織物(wu)(wu)了,棉(mian)(mian)織物(wu)(wu)的優點是(shi)(shi)吸濕性強,染色(se)性能好,手感柔軟(ruan),穿著舒適(shi),外觀(guan)樸素,不(bu)易蟲蛀,堅牢耐用;其(qi)缺點就是(shi)(shi)快干性能差。全(quan)棉(mian)(mian)印花(hua)...