電動槍BOX

有沒有大大可以幫小弟說明BOX內部~我是新手

BOX內部的零件跟功能??有圖最好

還有...活塞齒條...跟活塞...是ㄧ樣的東西嗎?我搞不太懂

煩麻有大大可以詳細說明BOX內部零件跟功能...

20點奉上~謝謝

Update:

那活塞排齒是甚麼??

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