名词
中文翻译：缺口块
同义词：
['notch', 'block', 'mortiser']
例句：
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1.The notch on the saw blade is perfect for cutting curves in wood.
锯片上的缺口非常适合在木头上切割曲线。
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2.The engineer used a block to hold the bolt in place during the installation.
工程师用一块来固定螺栓在安装过程中的位置。
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3.The carpenter used a mortiser to shape the wood before it was cut into pieces.
木匠用一个刨床来加工木材，使其成为小块。