Z 30130x31型摇臂钻床属于大型立式钻床，其传统的控制方式是利用继电器接触器原理控制。
Z30130X31-arm drilling is a large vertical drilling, the traditional control method is the use of relay contacts Principle control.
Z 30130x31型摇臂钻床属于大型立式钻床，其传统的控制方式是利用继电器接触器原理控制。
Z30130X31-arm drilling is a large vertical drilling, the traditional control method is the use of relay contacts Principle control.
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