无头铆钉

make both ends meet length of rivet shank straight shank socket wrench play both ends against the middle burn the candle at both ends headless with both hands with both feet money with both hands take gifts with both hands ends thin flat head socket shank rivet large oval head socket shank rivet beam with both ends built-in rivet shank difference between both ends socket weld ends shank of rivet beam supported at both ends beam supported of both ends rod threaded at both ends manage to make both ends meet