短語詞組短語horizontal gravel -packing 水平井礫石充填gravel -packing sand-control 充填防砂area of gravel -packing 充填區(qū)high -pressure gravel-packing and sand-preventing 高壓礫石充填flow -type gravel packing 循環(huán)式礫石充填tside casing high -pressure gravel packing 琯外高壓礫石充填low -pressure gravel squeeze packing 低壓擠壓礫石充填 返回 gravel packing