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2. Variable camshaft timing - Wikipedia

   en.wikipedia.org/wiki/Variable_camshaft_timing

   For twin-cam or DOHC engines, VCT was used on either the intake or exhaust camshaft. (Engines that have VCT on both camshafts are now designated as Ti-VCT.↓) The use of variable camshaft timing on the exhaust camshaft is for improved emissions, and vehicles with VCT on the exhaust camshaft do not require exhaust gas recirculation (EGR) as retarding the exhaust cam timing achieves the same ...

3. Pipe recovery operations - Wikipedia

   en.wikipedia.org/wiki/Pipe_recovery_operations

   The explosion produces a similar effect as an intense hammer blow and allows the joint to be unscrewed at the proper connection. Several factors such as pipe size, weight and condition, back-off depth, mud or borehole fluid weight and well temperature are carefully considered when making up the proper string-shot assembly. [8] Manual Back Off

4. File:LG logo (2014).svg - Wikipedia

   en.wikipedia.org/wiki/File:LG_logo_(2014).svg

   The logo of LG Group – South Korean multinational conglomerate ... Smaller file size: 02:19, 20 April 2016: 1,000 × 439 (6 KB) Nikon1803: Bigger logo: 04:11, 14 ...