pogrešno napisana riječ water hammer function, wiki Engleski Hydraulic shock (colloquial: water hammer; fluid hammer) is a pressure surge or wave caused when a fluid in motion, usually a liquid but sometimes also a gas is forced to stop or change direction suddenly; a momentum change. This phenomenon commonly occurs when a valve closes suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe.

korištenjem hidrauličkog ram efekta za probijanje metala udarcem, komprimirajući tekućinu u komori
.jeteco-tools.com/ hydraulic punch cylinder, hydraulic hole punch ram.

SYK-30, SYK-50, SYK-50T, SYK-100, SYK-100T heavy duty hydraulic punch cylinder.

NPT 3/8 coupling connector, for connecting with hydraulic pump.

--------------------------------------------------
Note added at 14 days (2022-03-08 20:00:24 GMT)
--------------------------------------------------

postoje velike hidrauličke preše i mali ručni hidraulični alat za ram, pogreška u pravopisu vjerojatno iz Kine
https://m.chinese.alibaba.com/wholesale/punch-tool-66.html

https://m.ebuyaz.com/the-main-advantages-of-hydraulic-punchi...