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。
The improved device consists of J2135 collision experiment device, drawing table and soleplate, and also adds a mobile board and a L-type positioning device.
改进的装置由J2135型碰撞实验器、绘图板和底板组成，并增加了活动托板和“L”型定位器等装置。
The incline-type paper-moving table top, together with the reduction gear and the positioning device, allows for more smoothness of sheet paper.
采用倾斜式走纸台面，配合减速装置和定位装置，使纸张更加顺畅。
A metal filtering pressure table is arranged in the furnace, which is used for separating air water and coke tar and replaces a split type separating device on the outer of the furnace.
炉内设有金属过 滤压盘，进行气水、焦油的分离。替代炉外分体分离装置。
A metal filtering pressure table is arranged in the furnace, which is used for separating air water and coke tar and replaces a split type separating device on the outer of the furnace.
炉内设有金属过 滤压盘，进行气水、焦油的分离。替代炉外分体分离装置。
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