There is also a wind indicator on the clock tower with a gliding sailing boat model in the middle.
钟楼上还设有风向仪，中间镶有一座鎏金英国帆船模型。
2
Tower cranes become more and more important lifting equipment in modern construction, its 'safe and reliable operation is an important indicator to ensure the safety of the whole construction site.
塔式起重机是现代施工中越来越重要的起重设备，其安全可靠运行是保证施工现场安全的重要指标。
3
Bench of closed circuit cooling tower that is composed of boiler, exchanger, orifice flowmeter, water pump, micromanometer, heat indicator and so on is established.