The number at the bottom is the recommended watertemperature in centigrade.
底部的数字为建议性摄氏度水温。
《柯林斯英汉双解大词典》
2
The deep gas wells of Qingshen gas field in Daqing are characterized by the great well depth, high bottomtemperature, high bottom pressure and gas production with water.
In thin ground inversion cloud, the cloud bottomtemperature was higher, the vertical convection was stronger, the super-cooled water increased faster and the content was richer.