Objective: To observe and measure the Sacro-iliac joint and correlative parts for clinical reference in Hemipelvic dislocation internal fixation by double head hollowed screw.

目的：通过骶髂关节及相关的解剖观测，为半盆脱位骶髂关节穿钉固定术提供临床应用依据。

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The paper described in detail the way and workmanship of centering of double head universal coupling during shafting alignment onboard high performance crafts that have flexible hulls.

本文详细阐述了具有柔性船体的高性能船体上轴系对中过程中双头万向联轴节的定位法和工艺。

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Automatic double-head milling machine n.

自动双轴铣床。

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It's on track to double its head count to 20, 000 from 10, 000 at the end of last year.

FORBES: How To Beat Google To Tech Talent

Facebook has about 500 employees but plans to double its head count by the end of the year.

FORBES: Google Loses Top Exec To Facebook

Double back and head up a block to Venice Boulevard to visit the Museum of Jurassic Technology (www.mjt.org), a deadpan collection of genuine fossilized curios and phony artefacts that feels like collaboration between Dave Eggers and David Lynch.

BBC: Culver City, ready for its close-up