首页> 外国专利> The method of mounting two-sided screws in screwed holes of cast iron fittings body and preparation of the surface on cintact of two-sided screw with the body surface

The method of mounting two-sided screws in screwed holes of cast iron fittings body and preparation of the surface on cintact of two-sided screw with the body surface

机译:在铸铁配件本体的螺孔中安装双面螺丝的方法以及双面螺丝与本体表面的接触面的准备

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