big hole perforator的用法和样例：
- This paper deals with the design, research and application of a kind of new technique on the big hole perforation in oil well and forming fissure in oil layer.
- Keywords liner;big hole perforator;EFP（explosive-formed-penetrator） theory;shaped-jet;
- He knocked a big hole in the wall.
- The hospital bills made a big hole in her savings.
- The hospital bill make a big hole in his savings.
- The hospital bills made a big hole in his savings.