投资者50（TZ50）指数中的 山推股份
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Its filling principle is the same as that of TZ50, specially added with sealing positioning and automatic capping system, allowing realizing the filling and capping functions easily.
其灌装工作原理与TZ50型相同，特增加了卡口定位和自动压盖系统，使灌装和压盖功能轻松实现。
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