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Leave the valve protection cap in place until the cylinder has been secured in place and is ready to be used.
让阀门保护帽一直留在原位,直到钢瓶已经固定好,并准备使用。
youdao
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Leave the valve protection cap in place until the cylinder has been secured in place and is ready to be used.
让阀门保护帽一直留在原位,直到钢瓶已经固定好,并准备使用。
youdao