核心应该是这样的规模，这是可以上下移动的阀芯孔，但将保留在任何位置。
The core should be of such size that it can be moved up and down in the spool hole, yet will remain in any position.
芒在一个垂直的位置上一空心线圈木材基地，使核心可移动通过在阀芯孔向上和向下。
Mount the coil in a vertical position, on a hollow wood base so that a core can be moved up and down through the hole in the spool.
连接件的下端挂接饵簧， 中部穿过基座的芯孔，上端穿出在基座上插接的塑料管后接挂绳；
The mid portion of the plastic branch pipe is fixedly arranged at the lower portion of a base through a connecting piece.
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