钻压

pressure on a drill bit

to press / to push down / to keep under (control) / pressure

see 壓根兒|压根儿[ya4 gen1 r5]

variant of 鑽|钻[zuan4]

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

an auger / diamond