钻压

钻压	zuàn yā	pressure on a drill bit
钻	zuàn	variant of 钻
钻	zuān	to drill / to bore / to get into / to make one's way into / to enter (a hole) / to thread one's way through / to study intensively / to dig into / to curry favor for personal gain
钻	zuàn	drill; auger / diamond
压	yā	to press / to push down / to keep under (control) / pressure
压	yà	used in 压根儿 / used in 压马路 / used in 压板