The upgraded drum locking device has integral drum locking blocks and a float screw rod, with the antivibration performance improved and the thread clearance eliminated.
改进的穿孔机转鼓器结构，采用整体压鼓块和浮动丝杆，消除了螺纹间隙，提高了抗振性能。
Valve for the hydraulic rod to mention, the automatic adjustment of valve clearance.
气门提杆为液压式，气门间隙不是手动调节。
Valve for the hydraulic rod to mention, the automatic adjustment of valve clearance.
气门提杆为液压式，气门间隙不是手动调节。
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