英语词汇“double jack”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	double jack
释义	double jack double jack [¦dəb·əl ′jak] (design engineering) A heavy hammer, weighing about 10 pounds (4.5 kilograms), requiring the use of both hands. (mining engineering) double drill column
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