holder-up

holder-up englanniksi

1. One who up|holds up something.

2. A bucker; one who 2|bucks rivets, typically holding a heavy bar against the bucktail of a rivet (heated if necessary till it is soft), while the riveter (or gunner or, before mechanisation, basher) uses a gun (an adjustable-impulse pneumatic hammer) fitted with a set, against the head to provide impulses which upset the bucktail into a head.