记录千斤顶
Recording jack
以上为机器翻译结果，长、整句建议使用 人工翻译 。
按图纸标高，用水准仪校准到统一高度，按位置记录并收紧螺纹千斤顶。
Screw jacks are put on the seat pads and adjusted to the same height using a leveling instrument. Then the screw jacks shall be fixed tightly and their positions recorded.
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