gravelyadv.严肃地;庄重地;严重地;沉重地
graveln.碎石v.铺碎石;使困惑
gravel washing screen洗砾筛
gravel pile foundation承载力
gravel compaction pile挤密碎石桩
gravel-sand riverbed卵石夹沙河床
gravel characteristics砾石特征
gravel washing machine砾石洗涤机
gravel pack straddle too砾石充填对口皮碗工具
Gravel System High Slope砂石系统高边坡
gravelliferon methylether芸香内酯甲醚
gravel sulfate salty soil砾类硫酸盐渍土