Wenzhou (formerly Yongjia, Yung-chia) is a prefecture-level city in southeastern Zhejiang province, People's Republic of China. The area under its jurisdiction, which includes two satellite cities and six counties, had a population of 7,645,700 in 2007.
An industrial city in Zhejiang province, in eastern China; pop. 1,650,400
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
control consisting of a mechanical device for controlling the flow of a fluid