We usually every few years of plastic rockery stone for maintenance, maintenance of the contents are: internalreinforcement, surface repair, complementary framework.
通常我们每隔几年对塑石假山进行维护保养，保养的内容有：内部骨架加固、表面修补、补色。
2
Valve body and internal parts: anodized aluminum alloy, copper. Reinforcement Cover: Plastic.
阀体和内部零件：阳极电镀铝合金、铜。加固端盖：塑料。
3
Internal force analysis with FEM can provide the foundation to choose the correct reinforcement scheme.