return valve वाक्य

The gear is strategically set as a barrier and fish voluntarily or involuntarily enter it, but their escape is hindered by a special non-return valve or device.
Along the heart run a series of paired ostia, non-return valves that allow blood to enter the heart but prevent it from leaving before it reaches the front.
Exhalation closes the mouthpiece non-return valve in the inhalation hose and pushes gas through the exhalation hose to the bellows counterlungs which will expand to accommodate the exhaled volume.
One of the recognised techniques is to contain the fire water in the drainage system using pneumatic bladders or lockable non-return valves which can be activated either automatically or manually.
The helmet must have a non-return valve at the air inlet port of the helmet, to prevent massive and fatal squeeze, should the air line be cut at the surface.

:I can't comment specifically on the water works in your jurisdiction, but it's quite common for either the water meter itself or an adjacent section of pipe to contain a non-return valve.
It is a long tube with a non-return valve running subcutaneously from the peritoneum to the internal jugular vein in the neck, which allows ascitic fluid to pass directly into the systemic circulation.
Although the injection pipe is usually protected with non-return valves to prevent release on a power outage, there is still a risk that the pipe itself could tear and leak due to the pressure.
If the bag becomes deflated while the wearer is on the surface awaiting rescue, it can be refilled ( for use as a lifejacket ) by opening the non-return valve and blowing through the mouthpiece.
The pump plunger rods connected to the outer free ends of the beams travel in a substantially straight-line motion; these were fitted with back to back diameter leather cups and non-return valves made from leather flaps.