besi ringan - An Overview
As revealed inside the figure, tightening the bolt results in a wedge becoming driven up towards a sleeve, which expands it and will cause it to compress against the material it truly is getting fixed to.Pelatihan: Pekerja harus mendapatkan pelatihan yang memadai tentang penggunaan angkur dan perangkat pelindung jatuh lainnya. Pelatihan ini penting