| 单词 | clamshell bucket | 
| 释义 | clamshell bucket [`klam´shel ´bǝk·ǝt]  MECHANICAL ENGINEERING A two-sided bucket used in a type of excavator to dig in a vertical direction; the bucket is dropped while its leaves are open and digs as they close. Also known as clamshell grab.  | 
	
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