... Combination anunular groove-axial labyrinth seal 复合式环形槽轴向迷宫式密封 Commercial seal 商品密封 Contact seal 接触式密封 ...
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commercial seal
商业密封
以上为机器翻译结果，长、整句建议使用 人工翻译 。
These tiny white pups were being given out all morning by animal rights campaigners to persuade people to vote for a European Union ban on the commercial trade in seal parts.
ECONOMIST: European politics
Chris Berman, a former Navy SEAL and an out-of-work commercial diver from Southern California, was hired by Blackwater a month before the ambush.
NEWYORKER: Coming Apart
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