life line mortar 救生索投索器
Dry Mortar Production Line 干粉砂浆生产线
Non-Line-of-Sight-Mortar 小组以及美国陆军披露了首门未来战斗系统非瞄准线迫击炮
But like soldiers anywhere, what they do not like are mortar attacks where the bombs hit closer to the front line and cause more casualties.
不过就像世界上任何一处的士兵一样,他们讨厌迫击炮的轰击。迫击炮的轰炸离前线更近,造成了更多的伤亡。
On the paper, constrative experiment of fly ash cement mortar, fly ash line cement mortar and datum cement mortar has been done. The influence of mortar's performance fly ash made is analysised.
本文通过对掺入粉煤灰的高强水泥砂浆、高强石灰水泥砂浆与基准砂浆的对比试验,分析了粉煤灰对砂浆性能的影响。
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