Top latest Five plat besi berlubang Urban news
As shown in the figure, tightening the bolt leads to a wedge being driven up from a sleeve, which expands it and causes it to compress towards the material it really is staying fixed to.Selain itu, angkur baja juga bertugas untuk mendistribusikan beban secara merata guna mengurangi tekanan pada titik-titik tertentu. Ini dapat mencegah kegagalan str