台球杆直度检测器,还需要自行购买4个608高速轴承、4个M4*24的螺丝、4个M4防脱螺母等,进行装配!
For the billiard cue straightness detector, you also need to purchase 4 608 high-speed bearings, 4 M4*24 screws, 4 M4 anti-loosening nuts, etc. for assembly!