The plastics-steel combination flame-retardant barn ventilator has the advantages that: first, the plastic container has a plurality of forming changes, high hole rate and good ventilation;

本实用新型具有以 下优点：一是塑料的器体成型变化多，开孔率高，通气性好；

youdao

Moreover, forcing the steel industry to suppress the price increase slowed down the substitution of aluminum and plastics for steel in the production of cars and other products.

此外，强迫钢铁行业压低价格，会减少汽车以及其他产品生产中铝以及塑料这些钢铁替代品的生产。

youdao

Glass, stainless steel and some plastics are food grade.

玻璃，不锈钢和一些塑料就属于食品级材料。

youdao

The companies involved read like a Who's Who of industrial America: high-value, energy-intensive businesses like steel, aluminum, plastics, glass, vehicles and packaging.

WSJ: Export U.S. Gas, Yes or No?

Another author, Julian Allwood, from Cambridge University, has been studying the five most energy-intensive sectors: steel, aluminium, cement, plastics and paper.

BBC: Savings needed to meet future demand for resources