供应硅酸钙|硅酸钙|硅酸钙报价
Snapping lines and marking fixed points for the panels, afterwards making a hole in advance(1-2mm in diameter, slightly bigger than screw head, and 1-2mm in depth). The fixed point should be 40-55mm to the corner of the board and the space between the fixed points should be 250-300mm.
6.Before the panels are fixed, it should be holed in advance on both the board and the profile. The size of the hole should be fixed from its center to edges, each screw should be enter into the board by 1mm. When
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09/10 19:49