The results showed that the wear-resistant belt in drill joint was actually an isolation belt, which could protect the drill joint and sleeve from serious abrasion, and the optimization and improvement of its performance was the technical key to preventing sleeve from serious abrasion.

結(jié)果表明又爽又粗又大欧美日韩视频，鉆桿接頭耐磨帶實(shí)質(zhì)上是一個(gè)隔離帶，用以保護(hù)鉆桿接頭和套管免遭強(qiáng)烈磨損，接頭耐磨帶性能的優(yōu)化與改善是防止套管強(qiáng)烈磨損的關(guān)鍵技術(shù)措施啪啪啪免费试看。

The application of the gap element method in gap joint mechanisms is proposed. The stiffness matrix of the rotate joint elements and sleeve joint elements with gap elements are formed and the dynamic equation of the structure is given in the paper.

文中還提出了旋轉(zhuǎn)鉸和滑移鉸兩種間隙單元，推導(dǎo)了間隙單元的剛度矩陣操逼冒白浆，最后給出了含間隙單元的結(jié)構(gòu)動(dòng)力學(xué)方程999久久精品国产首页。

Are set processing, production and sales of integrated enterprise, Main specifications of the dual-head models to stay plate Plum wrench, dual-purpose wrench (semi-parabolic / wide parabolic), active wrench (Zhanhua Plastic / Phosphating / calibration / chrome), a full range of instrument sets sleeve, the sleeve head, then a long shot, short take-under, ratchet wrenches, Freedom Next, slide the first handle rod afterburner, universal joint, the two sides bend Handle, Express±ú, large sliding head, curved handle, L-type wrenches, tire sleeve, saw blade, circular saw blades and other products, high-quality carbon steel and medium carbon steel.

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sleeve ironing board：熨袖板

sleeve governor 套筒式調(diào)整器 | sleeve ironing board 熨袖板 | sleeve joint 套管接頭

sleeve nut：套筒螺帽

sleeve type 袖籠式 | sleeve nut 套筒螺帽 | sleeve joint 套筒接頭

sleeve nut WESTBANK：套筒螺帽

sleeve type WESTBANK 袖籠式 | sleeve nut WESTBANK 套筒螺帽 | sleeve joint WESTBANK 套筒接頭