6960| 12
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矩形管連接方法 |
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點評
不是,注意是25X50的矩形管,每根1.7米,還若干根連接,還要剛性...還要直線度,這問題有意義嘛...
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點評
就像2樓說的,不說做好之后到底干嘛,那就真的沒法說了。非要說一個?雨傘的桿子?
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