两脚规[liǎng jiǎo guī]
Sector; compasses; dividers
1. sector compasses:dielectric oil 介电油 绝缘油 | sector compasses 两脚规 | pervious subsoil 透水底土层
2. compass:compactor 压实机 | compass 两脚规 | compass plane 曲面刨
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3. divider callipers:divided-plate oscillator 分瓣振荡器 | divider callipers 两脚规 | divider corrector 分配校正器
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4. bisecting compasses:bise 干冷风 | bisecting compasses 两脚规 | bisecting line 二等分线