For ease of installation, insert all flange bolts through the valve flange and then through the sleeve flange, but do not let the bolts extend beyond the surface of the flange rubber (See Figure 4).
Later, people tried to lift a building off its foundation, and insertrubber and steel between the building and its foundation to reduce the impact of ground vibrations.
后来，人们试着把建筑物从其基地上撑起来，在建筑物和地基间灌入橡胶和钢铁以减少地表震动的影响。
3
Shock eraser insert: thermoplastic rubber core inside a thermoplastic elastomer butt cap is pressure fit into the shaft to reduce frame shock and vibration.