base screw
常见例句
- Step #2 : Remove Screw From Base
第二步：取下拧在底座上的螺丝 - The new unit is mainly made up of adjusting base, leading screw, diagonal rack and special spanner.
该装置主要由调整座、丝杠、斜齿条和专用扳手组成。 - The utility model provides an early-warning vertebra bow base screw wimble, which relates to a surgery device.
本实用新型可预警的椎弓根螺锥，涉及一种外科手术器具。
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