砾石层 meaning in English
gravel bed
gravel layer
gravel stratum
gravelly layer
layer of gravel
pebble-bed
Examples
- Drilling technology for thicker conglomerate in the well ta
塔1井巨厚砾石层钻井技术 - Boring technology for pile foundation with deep gravel layer
高速公路深厚卵砾石层桩基成孔技术 - Infixion method used in gravel
砾石层中适宜选用的钻进方法 - Drilling gravel formations in the western area : challenges and solutions
西部地区砾石层钻井难点及对策 - The larger reverse circulation bits used for drilling through pebbles
卵砾石层大直径反循环桩孔钻进用钻头