高空作業 [－－－业]

Jyutping gou1 hung1 zok3 jip6
Pinyin gāo kōng zuò yè

Definitions (CC-CEDICT)
  1. to work high above the ground
Definitions (Wiktionary)
  1. noun
    work high above the ground; aerial work
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）