base screw
常见例句
- Step #2 : Remove Screw From Base
第二步：取下擰在底座上的螺絲 - The new unit is mainly made up of adjusting base, leading screw, diagonal rack and special spanner.
該裝置主要由調整座、絲杠、斜齒條和專用扳手組成。 - The utility model provides an early-warning vertebra bow base screw wimble, which relates to a surgery device.
本實用新型可預警的椎弓根螺錐，涉及一種外科手術器具。
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