直(zhi)接測數法是憑借照(zhao)布(bu)鏡(jing)或(huo)織(zhi)物密(mi)度(du)(du)分(fen)(fen)析鏡(jing)來完成(cheng)。織(zhi)物密(mi)度(du)(du)分(fen)(fen)析鏡(jing)的刻度(du)(du)尺長度(du)(du)為(wei)5cm,在分(fen)(fen)析鏡(jing)頭下(xia)面(mian),一塊長條形玻璃片上刻有一條紅線, 滌綸印花(hua)帆(fan)(fan)(fan)(fan)布(bu),滌綸帆(fan)(fan)(fan)(fan)布(bu)是全滌帆(fan)(fan)(fan)(fan)布(bu),有的全滌帆(fan)(fan)(fan)(fan)布(bu)可能比全棉帆(fan)(fan)(fan)(fan)布(bu)還(huan)要貴,滌綸帆(fan)(fan)(fan)(fan)布(bu)強(qiang)(qiang)度(du)(du)高(gao)、彈(dan)性好、耐(nai)沖(chong)擊性好、耐(nai)腐、耐(nai)蛀、耐(nai)熱、耐(nai)光(guang)性好,曝曬(shai)1000小(xiao)時,強(qiang)(qiang)力保(bao)持60...