The open angle indicating device should display the open state of the valve gate exactly.
开度指示机构应准确地显示阀门的开启状态。
Please state the generic product type e. g. Washing Machine, Gate Valve, WC etc.
请描述所申请产品类型：如洗衣机，阀门，马桶等。
When he arrived, the city gate of the State of Lu was already tightly shut.
碰上天气酷寒，在鲁国城门关闭后才赶到城边，只好跟他的一个门徒在城外露天过夜。
When he arrived, the city gate of the State of Lu was already tightly shut.
碰上天气酷寒，在鲁国城门关闭后才赶到城边，只好跟他的一个门徒在城外露天过夜。
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