|
AT112584B
|
|
Device for measuring pressure heads.
|
|
GB219312A
|
|
Improvements in slide-valves
|
|
GB198666A
|
|
Improvements in or relating to shutting off devices and valves
|
|
GB210783A
|
|
Improvements in or relating to braking devices for automatically closing pipe isolating valves
|
|
US1649735A
|
|
Shutting-off device and valve
|
|
GB196280A
|
|
Improvements in or relating to pressure controlling valves
|
|
DE405408C
|
|
Pressure regulator
|
|
US1157583A
|
|
Multiplier of efficiency for float apparatus.
|
|
FR362556A
|
|
Refinements to expansion valves
|
|
DE473852C
|
|
Valve in which the shut-off device controlled by the pressure medium is coupled to a piston or a membrane
|
