... hand level ==> 手水准,手用水平仪 hand lever ==> 手杆 hand lever adjustment ==> 手柄调整 ...
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hand lantern lever adjustment 手柄调整
hand lever adjustment
手动调节
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The lever type differential adjustment can be made by hand or by foot to make the operation simply and freely. it is capable for sewing various flexible fabrics.
杠杆式差动调节，即可手动又可脚动，使操作变的简单自如，最适合伸缩面料的各种缝制要求。
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