常見例句雙語例句When the pickup is exceed the critical value, the softness of PU leather based nylon-6 is lower than which based on polyester.當(dāng)上漿率超過一臨界值時(shí)，錦綸基布聚氨酯合成革已不如滌綸基布聚氨酯合成革柔軟。 返回 pu pickup