void formers meaning in English
制孔机
Examples
- Inflatable void formers
充气多孔形成机 - Relacing void former - coring through beams and slabs for the installation of ducts and pies . holes formed by coring will be more precise , fast and help increasing productivity
代替在结构混凝土上留孔-在部份工程因工程关系和时间上须要而不能预先留位以便日后管道安装之用，则多数曾采用钻孔之方法以提高工作效率。