| 摘要 |
A valve element opening/closing device may include a main body formed with a space, an inflow pipe and an outflow pipe which are connected to the main body, a valve element for opening and closing a flow passage, and a drive part for driving the valve element to open and close the flow passage. The valve element may be arranged on an inflow pipe side with respect an opening of the main body to which the inflow pipe is connected. The valve element is preferably arranged within the inflow pipe.
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