soft-middle hard formation的意思|示意
美 / /
英 / /
软-中-硬地层
soft-middle hard formation的网络常见释义
软 软-中硬岩层
soft-middle hard formation相关例句
Production experiment indicates that this kind of drill bit has ideal effect in the middle-hard broken formation and the soft-hard interlayer as well as in the gravel formation.
生产性试验表明，该类型钻头对于钻进硬而破碎地层、软硬夹层以及卵砾石地层均具有很好的使用效果。