n.開孔

The principles, characteristics, processing laws and efficiency of EDM trepanning cavity of the moulds were analyzed. 分析了電火花套型加工的工藝原理、特點及加工工藝規(guī)律和加工效率。

About this standard provision classify, trepanning and reinforce of hull structure. 本標(biāo)準(zhǔn)規(guī)定了船體強力構(gòu)件上的區(qū)域分類，開孔及補強。

The work principle of a bore trepanning machine for rare-earth permanent magnetic material prestented. 闡述了用于稀土永磁材料套孔加工的自動稀土旋孔機的工作原理，介紹了機械系統(tǒng)結(jié)構(gòu)設(shè)計及特點。

In view of cost, practicability and maneuverability, the special sintering diamond trepanning drill was developed for drilling ceramic composite components originally. 根據(jù)復(fù)合構(gòu)件加工中的各種缺陷，分析了采用預(yù)壓應(yīng)力鉆削對改善表面加工質(zhì)量的重要性。

Methods The results of anterior decompression and fusion with ZDS trepan in 27 patients with cervial injury and disc herniation were analyzed. 方法分析27例頸椎外傷、頸椎間盤突出癥患者使用ZDS旋轉(zhuǎn)推進(jìn)式環(huán)鋸行頸椎前路減壓融合術(shù)治療的結(jié)果。