弯的技巧是在管子里灌沙而且要捣实了再加热弯,这样才不会瘪了
只要管壁夠厚就没事
本帖于 2020-06-12 16:07:09 时间, 由普通用户 MoonRiverMe 编辑
弯的技巧是在管子里灌沙而且要捣实了再加热弯,这样才不会瘪了
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