graveln.碎石v.铺碎石;使困惑
gravel-pile碎石桩
gravel pocket砾石填坑
gravel washer洗砾机
gravel ground砾质土
gravel system砾石层
gravelly stake碎石桩
Gravel content砾石含量
gravel packing砾石充填
gravel bedload卵石推移质
gravel filling填砾工艺