... stock exchange operation: 证券交易所业务 automatic exchange operation: 自动交换操作 free exchange operation: 自由外汇业务 ...
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Objective To develop an automatic device for ventilation and gas exchange in hyperbaric oxygen chamber in order to avoid of the defects in manual operation.
目的研究高压氧舱的自动通风换气系统，解决手动控制的各种弊端。
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