大航
大航-
三大航也在考虑恢复燃油对冲操作。
The airlines are also contemplating a resumption of fuel hedging activities .
-
最后，为避免在大航深下换速时发生热爆，结合鱼雷热动力系统的运转工况，提出了可能的改进措施。
According to the working condition of torpedo thermal power system , some measures , which maybe avoid the explosion while torpedo 's speed increase in large depth , were given at last .