耐压管 meaning in Chinese

pressure tubing
pressure-proof pipe

Tube and pipe fittings for engineering purposes - specification for olive type copper alloy compression tube fittings
工程用管与管接头规范.第2部分:橄榄型铜合金耐压管接头
Tube and pipe fittings for engineering purposes - copper and copper alloys capillary and compression tube fittings for engineering purposes
工程用管与管接头规范.第1部分:工程用铜与铜合金毛细管与耐压管接头