EPS insulation board and XPS insulation board What is the difference?
If it is floor scaffolding, erection is double row, can be erected to the height of 26m, we bones plant Fen broken lettress wind courier has set up a 42m high scaffolding, but after the expert argument before erection, you The use of this erection method need to pay attention to: . the basis of scaffolding to be true, if it is backfill earthwork, it is recommended that you do C20 concrete scaffolding base, the thickness of 100mm above the width of 1100 or so. . scissors need to rely on each pole, rather than jumping scissors support.
Landlord cast aluminum engine light, now more use. But the performance of Penny biting bran and perseverance to seek mercy is that he did not cast iron engine heat, resistance to friction. Cast aluminum engine in the repair to be very attention, because it is easy to deformation, not stiffness strength. Iron is China's relatively small things, so most of them are cast aluminum engine.
