four-screw leveling head 四螺钉安平头
four way leveling 两向四面调平
four-way leveling 纵横向调平
four order leveling 四等水准测量
four grade leveling survey 四等水准测量
four leveling
四个平
以上为机器翻译结果，长、整句建议使用 人工翻译 。
We ran through the leveling script no less than four times before we saw optimal results.
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