... 引导号志机 calling-on signal 卡尺 calliper rule 测径器，卡尺，卡钳，两脚规，厚度(纸板等的)，用卡尺测量 callipers ...
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boxwood calliper rule 黄杨木卡尺
N a measuring instrument having two parallel jaws, one fixed at right angles to the end of a calibrated scale and the other sliding along it 卡尺
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