Supervisory switch is preset and tested in accordance with all applicable agency requirements at the factory. No adjustment is possible once the valve is assembled.
监控开关都是按照所有相关管理机关的要求在工厂进行预置和测试。一旦阀门装配后，就不可能进行调整。
No preset appointment is necessary, except for surgical procedures.
没必要预约，外科手术除外。
Some people to approach will be friends, family, colleagues, boss, or even acquaintances, since they will have no preset bias and can give their feedback objectively.
你可以向朋友、家人、同事、老板或认识的人寻求反馈，因为他们不持偏见，可以作出客观反馈。
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