直(zhi)接測數(shu)法是憑(ping)借(jie)照布鏡(jing)(jing)或織物密(mi)度(du)分析(xi)(xi)鏡(jing)(jing)來(lai)完(wan)成。織物密(mi)度(du)分析(xi)(xi)鏡(jing)(jing)的刻度(du)尺長度(du)為5cm,在分析(xi)(xi)鏡(jing)(jing)頭下面,一塊長條形(xing)玻璃片上(shang)刻有(you)一條紅(hong)線(xian), 尼(ni)龍(long)(long)纖維(wei)(wei)強度(du)高達700牛/(毫米·層),耐水,抗腐(fu)蝕,耐彎(wan)曲(qu)疲勞;但彈性伸長較大(da)。聚(ju)酯纖維(wei)(wei)性能與(yu)尼(ni)龍(long)(long)纖維(wei)(wei)相近(jin),而使用時彈性伸長僅為尼(ni)龍(long)(long)纖維(wei)(wei)的一半,是一種有(you)發展前(qian)途...