Plastics were becoming the material of choice because the finished goods were inexpensive to produce in mass quantities and abrasives were used to finish plastic injection molds.
塑料已成为首选材料，因为成品价格低廉的产品质量和数量磨具被用来完成注塑模具。
2
Non-pollution, The pump body is made of polyvinyl chloride (pvc)plastics, and the onter cover is of cold-rolled steel plate with backing finish.
无污染，本机箱体为聚氯乙稀塑料，外壳采用不锈钢和冷板静电喷塑壳两种。
3
The title finish has been developed based on proper mixture of oligomer and monomers and incorporation of non-yellowing photoinitiator. The formulations are designed for various plastics.