短語(yǔ)詞組短語(yǔ)bench h height 臺(tái)堦高度horizontal bench height 平溝段高optimization of bench height 臺(tái)堦高度優(yōu)化Bench height optimization 臺(tái)堦高度優(yōu)化height bench cast blasting 高臺(tái)堦拋擲爆破 返回 bench height