All cranes will be equipped with a functional weight indicator on the main hoist and a boom Angle indicator, both visible by the operator.
所有的起重机都应当有主钩的起重能力指示器和扒杆角度指示器，并且起重机司机要看得见。
A pig indicator or "pig sig" is used to detect the passage of the pig and alert the operator by tripping a suitable warning device.
清管器指示器或“清管器发讯器”用来探测清管器是否通过、并启动报警装置通知操作人员。
The NIBCO HPR butterfly valve can be provided with heavy-duty weatherproof operator and indicator.
美国尼伯科hpr蝶阀可配备重型、抗恶劣气候的操作装置和指示装置。
The NIBCO HPR butterfly valve can be provided with heavy-duty weatherproof operator and indicator.
美国尼伯科hpr蝶阀可配备重型、抗恶劣气候的操作装置和指示装置。
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