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He took his seat in an unobserved corner of the assembly room.
他在会议室一个不为人注意的犄角坐下来。
《新英汉大辞典》
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Unscrew seat cylinder from body and remove entire assembly.
从阀体上拧下阀座圆筒上的螺丝，并拆卸整个总成。
youdao
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Unscrew seat cylinder from body and remove entire assembly.
从阀体上拧下阀座圆筒上的螺丝，并拆卸整个总成。
youdao