Johnny Posted May 6, 2008 Report Share Posted May 6, 2008 Great! BTDC = Before Top Dead Center ATDC = After Top Dead Center BBDC = Before Bottom Dead Center ABDC = After Bottom Dead Center Top dead center and bottom dead center are the two points where the piston changes direction. Quote Link to comment Share on other sites More sharing options...
Guest Posted May 7, 2008 Report Share Posted May 7, 2008 ok! In French it's PMH and PMB (point mort haut ; point mort bas) It would be translated "upper dead point" and "lower dead point"... Thanks Quote Link to comment Share on other sites More sharing options...
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