pore-expanding的用法和樣例：
例句
- In addition, because of the large pipe diameter, more bore expanding levels are needed, and it interferes with stratum by impact.
加之穿越管徑大，擴孔級數較多，對地層的沖擊擾動(dòng)較大，增加了塌孔的可能性，施工難度很大。 - The die and eqiupment of internal pressurized expanding retaining rings and double cone wedge-reaming die were also studied.
對內增壓擴脹護環(huán)的裝置和雙錐面楔塊擴孔模具進(jìn)行了研究。
