電(diàn)廠(chǎng)、水(shuǐ)庫大(dà)壩水(shuǐ<$♠≥)下(xià)技(jì)術(shù)服務
Underwater services for po≤♥≠wer plants, reservoirs and >₹dams
大(dà)壩定期水(shuǐ)下(xià)檢驗 Underwat∞"er inspection for dam<≠、大(dà)壩水(shuǐ)下(xià)修理(lǐ) Under♦≥water repair for dam
閘門(mén)水(shuǐ)下(xià)清理(lǐ) λ₹β×Underwater cleaning for sl ¥uice gate