valve action造句

• In 1987, Markal went outside of the solid stick paint model and started producing a liquid paint marker called the Valve Action Paint Marker.
• When he soon improved the device by removing the poppet valve action, these three components became the piston valve, the slide valve, and the graduating valve.
• The most recent product introduction was the 2008 release of the PRO-LINE HP which was designed as a quick drying alternative to the Valve Action Paint marker.
• It also has electric fuel injection, which is rare in motorcycles, and something the manufacturer calls " desmodromic " valve action, which makes the engine more efficient.
• This pneumatically assisted valve action is in contrast to a direct electric action in which each pipe's valve is opened directly by an electric solenoid which is attached to the valve.