Open test cocks to drain in cold climates if only operated seasonally.
如果仅仅是季节性运行，则在寒冷环境下开启测试旋塞。
2
Nicole lived on a farm where cocks were used as alarm clocks, and coal was burned when it was cold in the winter.
妮科尔住在一个农场里，那里公鸡被当作闹钟，冬天冷的时候烧煤。
3
In order to clean the bottom floor of engine room, the hot and cold fresh water pipes and cocks to be installed from engine control room to bottom floor.