发布时间:2025-02-02 19:33:29
用两把扳手(或管钳),分别夹住接头和弯头的六角部分,向相反方向拧动即可拆开。方向是,面对管子的方向,上面的弯头沿逆时针方向拧动,下面的直管接头固定。
要在直径50厘米的圆形木板上截出四个大小相同的板面怎样才能截出直径最大的板面
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