Functions : two stage shut-off, flow-rate control in conjunction with any electronic register with digital flow control.

功能： 双开关，流量控制与任何数字流量控制的电子登记   结合。

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Two major companies, Florida Stage and Seattle's Intiman Theatre, were forced to shut down (though Intiman is reconstituting itself as a summer-only "theatre festival").

WSJ: Theater's Expiring Subscription Model | Sightings by Terry Teachout