This kind of resin composite manhole cover with glass fiber and resin as the basic material, curing agent, accelerator as auxiliary material.
这种树脂复合型井盖以玻璃纤维和树脂为基本材料，以固化剂、促进剂等为辅助材料制成。
This kind of resin composite manhole cover with glass fiber and resin as the basic material, curing agent, accelerator as auxiliary material.
这种树脂复合型井盖以玻璃纤维和树脂为基本材料，以固化剂、促进剂等为辅助材料制成。
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