Construction When the fastener type steel pipe scaffold is only allowed to be used once
What kind of plastic effect will not be long, the strength of the glue will burn the wallpaper
If special reinforcement requirements, you can use plastic expansion screws to anchor
Construction safety management system of enterprises in the first chapter at all levels of management of the safety of production responsibility The legal representative of the safety of production responsibilities Second, the enterprise technical person in charge of the safety of production three
