Plasticscover, completely enclosed, without screws, requires no earth grounding.
全塑外壳， 完全密封， 无外加螺钉， 无需接地线路。
2
Polystyrene foamed plastics and GR6 used to cover the surface of grain bulk for insulation heat were tested.
本试验选用聚苯乙烯泡沫塑料和GR6作为隔热材料进行粮面压盖隔热保冷试验。
3
It was considered that the main cause of plastics weathering was sun's rays, and that plastics packaging box should not be stored without any cover in outdoor.