空心鉆頭 的英文怎麼說
中文拼音 [kōngxīnzhēntóu]
空心鉆頭
英文
hollow bit-
From this moment vampa devoted all his leisure time to perfecting himself in the use of his precious weapon ; he purchased powder and ball, and everything served him for a mark - the trunk of some old and moss - grown olive - tree, that grew on the sabine mountains ; the fox, as he quitted his earth on some marauding excursion ; the eagle that soared above their heads : and thus he soon became so expert, that teresa overcame the terror she at first felt at the report, and amused herself by watching him direct the ball wherever he pleased, with as much accuracy as if he placed it by hand
從此以後，萬帕就把他全部的空余時間都用來練習使用這寶貴的武器上了，他買了火藥和子彈，無論什麼東西都可以被他拿來當目標長在沙坪山上的滿身苔蘚的橄欖樹的老樹干，從地洞里鉆出來覓食的狐貍，在他們頭頂上翱翔的老鷹。所以不久他的槍法就非常準確了，以致最初一聽到槍聲就害怕的德麗莎也克服了她的恐懼，竟能很有興趣地看著他隨心所欲地發彈射物，其準確程度，真象彈靶近在幾尺一樣。Under the function of big pressure and dynamic load, the grains may be moved which may cause the soil body distortion. at present, the relatively ripe methods of drill in gravel layer are mostly double - wall drill pipe reverse circulation drilling, auger stem breast wall drilling and down - the - hole hammer follow down drilling
論文根據jsl ? 30型礫石鉆機潛孔錘同心跟管鉆具結構，採用程序計算得到了鉆桿內各深度處壓力分佈、鉆頭壓力降、環形空間壓力分佈及空氣流速分佈。
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