432203
Subclass
Water well drilling
鑽水井
Classification Hierarchy
Related Codes in the Same Group
432201
432202
432204
432299
Air-conditioning and ventilation system, installation and maintenance
空氣調節及通風系統安裝及保養
Water plumbing and drain laying
供水管及排水管鋪設
Gas fitting, installation and maintenance
燃氣供應系統裝設、安裝及保養
Combined and other ventilation, gas and water fitting, installation and maintenance
綜合及其他通風、燃氣及水務設備安裝及保養