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- This paper introduces research and development of DH pneumatic perforating machine, hydraulic percussion hammer and trajectory -controlled pneumatic perforating machine and their application. 非開(kāi)挖技術(shù)在國際發(fā)展迅速，在我國尚有差距，本文介紹我國DH氣動(dòng)穿孔機、液壓沖擊錘、軌跡可控氣動(dòng)穿孔機的研制及工程應用情況。
- percussion hammer firing mechanism 擊針錘擊發(fā)裝置
- Flint's percussion hammer 弗林特(氏)叩診錘
- This layer of rock contains a lot of flint. 這一巖層中有大量燧石。
- Your cigarette-lighter needs a new flint. 你的打火機需換新電石了。
- At that time they have learn to strike fire from flint. 那時(shí)他們已學(xué)會(huì )了用燧石打火。
- They spend the winter(s) in a warmer climate. 他們在氣候較暖的地方過(guò)冬。
- Most plural nouns in English end in "s". 英語(yǔ)的復數名詞多以“s”結尾。
- The sweater had shrunk after repeated washing(s). 這件套頭毛衣洗過(guò)多次已縮水了。
- Some old folk(s) have peculiar tastes. 有些老人有特殊的愛(ài)好。
- A piece of flint used as a tool by primitive human beings. 打火石原始人作為工具用的一塊打火石
- Taylor's percussion hammer 泰勒(氏)叩診錘
- At that time they had learned to strike fire from flint. 那時(shí)他們已學(xué)會(huì )了用燧石打火。
- Answer the following question(s). 回答下列問(wèn)題。
- Most plural nouns in English end in s'. 英語(yǔ)的復數名詞多以s結尾。
- percussion hammer 沖擊式鑿巖機,沖擊錘,叩診錘
- The drug affects one's power(s) of concentration. 這種藥影響人精神不能集中。
- Here are the designs. Which one(s) do you prefer? 這就是那些圖樣.;你喜歡哪一個(gè)[些]?
- folding percussion hammer 折式打診錘
- Which journal(s) do you subscribe to? 你訂閱哪一種雜志?
