中国不锈钢井盖的研发和面市的复合井盖制品，基本均按照以下三种技术路线进行。
The R&D of stainless steel covers in China and the products of composite covers on the market are basically carried out according to the following three technical routes.
(1)菱镁材料井盖(无机玻璃钢井盖);
(1) Magnesium Material Well Cover (Inorganic FRP Well Cover);
(2)玻璃钢/不锈钢材料手糊井盖;
(2) Fiberglass reinforced plastic/stainless steel hand covers;
(3)BMC模塑料井盖;
(3) BMC moulded well cover;