...关店歇业 to close up shop and cease business temporarily; closed for business 关紧 to fasten securely; to close firmly; to lock; to make fast 关境 customs border ..
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to fasten securely
牢固地固定
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Attach the regulator. Fasten the regulator to the cylinder and tighten the inlet nut securely.
连接调整器。把调整器紧固在钢瓶上，安全地上紧入口螺母。
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Fasten the regulator to the cylinder and tighten the inlet nut securely.
把调整器紧固在钢瓶上，安全地上紧入口螺母。
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