grub machine的用法和样例：
例句
- Rile excavation machine industry guided by her has become king-post industry of company, and made an indelible contribution for prosperity of company.
她所率领的日立挖掘机产业成为公司的支柱产业，为公司的蒸蒸日上做出了不可磨灭的贡献。 - When the backhoe is permanently attached, the machine usually has a seat that can swivel to the rear to face the hoe controls.
当挖掘机被固定上以后，通常上面安装一个可旋转的座椅，操作者工作时可以面对被操作对象。
