Yu fund. Liu Qing "Pioneering" Part VIII: "This money should be cut in the mutual aid teams into the bamboo Zhongnanshan time for his team to do the bottom cushion."
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No. 2
Base wad 【底垫】
加在散弹弹壳底部与装药间的布质或塑胶质衬垫，用以强化弹壳底部并支撑底火。现代多和弹垫（wad）结合。