直接測數(shu)法(fa)是憑借照布(bu)(bu)鏡(jing)或織物(wu)密(mi)(mi)度分(fen)析鏡(jing)來完(wan)成。織物(wu)密(mi)(mi)度分(fen)析鏡(jing)的刻度尺長(chang)度為(wei)5cm,在分(fen)析鏡(jing)頭下面,一(yi)塊長(chang)條形玻(bo)璃(li)片上刻有一(yi)條紅線(xian)(xian), 手(shou)(shou)(shou)(shou)套機縫制(zhi)(zhi)的針腳(jiao)越細密(mi)(mi),帆布(bu)(bu)手(shou)(shou)(shou)(shou)套就越結實,一(yi)般不會(hui)開線(xian)(xian)。買帆布(bu)(bu)手(shou)(shou)(shou)(shou)套的人都明白(bai)這個道(dao)理。手(shou)(shou)(shou)(shou)套開線(xian)(xian)是一(yi)件很(hen)郁悶的事。所以我(wo)們無論(lun)采(cai)用明線(xian)(xian)還是暗線(xian)(xian)縫制(zhi)(zhi)的手(shou)(shou)(shou)(shou)套,針腳(jiao)兒的長(chang)...