The rules of dimension change of plastic bonded explosive PBX TATB charges during thermal cycling were studied in detail, and the methods of reducing the permanentexpansion were studied.
研究了塑料粘结炸药PB X TAT B药柱在热循环过程中的尺寸变化规律,探索了减小永久性长大的方法。
3
With curbs on carbon emissions expected and an expansion under way into natural-gas and alternative energy, some firms are considering permanent cutbacks in their refining business.