The mineralization system was a semi-closed state in the main metallogenic stage.

在主要成矿阶段，体系处于一种半封闭状态。

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The system is a semi-closed loop system that knock sensor was used.

由于采用外部的爆震传感器，整个系统成为一个半闭环系统；

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The system is a semi-closed loop system that knock sensor was used.

由于采用外部的爆震传感器，整个系统成为一个半闭环系统；

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