15273| 12
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塑料攻絲 |
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點評
鑲嵌一個銅套 (帶M4內(nèi)螺紋) 在長管子里面, 有條件注塑成型的時候?qū)崿F(xiàn), 沒有條件可以鉚進去;
自攻螺絲至少比機械螺絲好,數(shù)數(shù)牙間距就明白了.
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