埋头铆钉: blind rivetbull head rivetbullhead rivetcounter sunk head rivetcounter-sunk rivercountersink head rivetcountersunk (or countersunk head) rivetcountersunk and chi ed rivetcountersunk and ch
埋头螺丝: countersink head screwcountersunk boltcountersunk screwsunk screw
