There is a pin hole between outside shell and output axis.
外套与输出轴的径向有一个插销孔。
Its iron ball consists of iron shell, drug-charging hole, drug-permeating pores and Chinese prepared medicine.
其铁球又是由铁壳、装药孔、渗药孔、中成药组成。
Its iron ball consists of iron shell, drug-charging hole, drug-permeating pores and Chinese prepared medicine.
其铁球又是由铁壳、装药孔、渗药孔、中成药组成。
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