The virtio_driver structure defines the upper-level device driver, list of device IDs that the driver supports, a features table (dependent upon the device type), and a list of callback functions.

virtio_driver 结构定义上层设备驱动程序、驱动程序支持的设备 ID 的列表、一个特性表单（取决于设备类型）和一个回调函数列表。

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Dedicated nozzles for each individual level device are preferred.

推荐每个单独的液位设备用专用的管口。

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Motor connects to the obliquity sensor to adjust the level state of laser level device.

马达与倾角传感器电连接，用以调整激光水平装置的水平状态。

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According to the new naming structure, new class designators refer to the specific category that the smartphone product fits into, for example a premium device, or an entry-level device.

ENGADGET: Samsung debuts new Galaxy lineup, refines naming strategy along the way

According to Mr. Castonguay, Nokia has done a good job of producing a balanced approach, with high-end phones to tackle the top of the market, and a cheaper entry-level device to service Nokia's traditional markets.

WSJ: Nokia's Bet On Microsoft May Still Payoff

Now, you may ask yourself, why not just go ahead and register it for clearance as a low-level medical device if the company thinks it can receive clearance?

FORBES: Preying on an Easy Mark