... 勤务船 miscellaneous vessel; service craft 勤务塔 service tower; servicing rig 勤务艇 serviceboat ...
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well servicing rig 修井机
offshore well-servicing rig 海上修井机具
On-site vibration test of the servicing rig substructure is made, and the frequency response function curve and preceding 10 modes frequency are obtained.
对现役钻机底座做了现场振动测试，得到频响函数曲线及前10阶模态频率。
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