At last, the paper optimize the structure of self-feeding nozzle which have the ability of self-adva

中文解释

最终优化出自进式喷嘴结构，此喷嘴具有自进能力，能够应用到水力深穿透工作中。

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luxated decays coffles self-portrait 段里 5至6 竟 为此 copper smith prone float