دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the colour of fluorescent light exhibited by some oils when viewed by reflected light. This usually differs from the colour as seen by transmitted light.

n pi: very hard and brittle pieces of serrated steel that are installed in the tongs and that grip or bite into the tool joint of drill pipe when the tongs are latched onto the pipe.

n: The toothing hard and brittle bloom that have been thermal treated,which be fixed in the tong.