BLACK ACETAL COPOLYMER, MCMASTER-CARR P/N 8497K111 OR EQUIVALENT x4 j& ]& d0 h, v+ g8 `% K 是黑色乙縮醛樹脂?能用黑色POM代替? ( } A; P9 d2 H& i7 ~( n 那串是什么代碼?何解?. {$ ~# Y8 R% L% p" a4 l 求大俠們幫忙解釋,謝謝 |
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