The complicated nature of the farmer's job gave him unrivaled training in invention and practical skill with tools and machines . 农夫那份工作的繁复,给了他在发明和实际使用器具与机械方面无比的训练。
They invent tools and machines to help them in their work 他们发明机器来帮助自己工作。
Compressors , pneumatic tools and machines . general vocabulary 压缩机,气压工具和机械.常用词汇
Pneumatic tools and machines - vocabulary 风动工具和机器.词汇
Pipeworks . screwed connections for pneumatic tools and machines 管道.气动工具和机械的螺纹连接管
Pneumatic tools and machines - vocabulary 气动工具和机械.词汇
Compressors , pneumatic tools and machines . vocabulary of compressors 压缩机.工具和气压机械.压缩机词汇
Glossary of terms for compressors , pneumatic tools and machines - general 压缩机气动工具和气动机械术语.第1部分:总则
Glossary of terms for compressors , pneumatic tools and machines - compressors 压缩机气动工具和气动机械术语.第2部分:压缩机
Compressors , pneumatic tools and machines . vocabulary . pneumatic tools and machines 压缩机风动工具和机械.词汇.风动工具和机械