The paper determines the rational range of a new spiral rotary drum's rotation speed through theoretically analyzing the critical speed of the drum in a coal machine.
通过对采煤机新型变升角螺旋滚筒极限转速的理论分析，确定了该种新型螺旋滚筒转速的合理范围。
The paper determines the rational range of a new spiral rotary drum's rotation speed through theoretically analyzing the critical speed of the drum in a coal machine.
通过对采煤机新型变升角螺旋滚筒极限转速的理论分析，确定了该种新型螺旋滚筒转速的合理范围。
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