pore-expanding

英 ['pɔːrɪksp'ændɪŋ] 美 ['pɔːrɪksp'ændɪŋ]

• 扩孔

pore-expanding的用法和样例：

例句

1. In addition, because of the large pipe diameter, more bore expanding levels are needed, and it interferes with stratum by impact.
   加之穿越管径大，扩孔级数较多，对地层的冲击扰动较大，增加了塌孔的可能性，施工难度很大。
2. The die and eqiupment of internal pressurized expanding retaining rings and double cone wedge-reaming die were also studied.
   对内增压扩胀护环的装置和双锥面楔块扩孔模具进行了研究。