Paper introduces a technique of the normal four-wheel tractor equipped with exhaust gas controlling device and designs a computer safety monitor system.
论述了在普通四轮拖拉机上加装废气控制装置的技术，设计了一种相配套的计算机安全监测系统。
When the certificate is disappeared, lost or destroyed owner of the tractor should timely apply Agricultural Mechanical Safety Supervision Agency for reissuing or re-certificating of a new one.
本证书灭失、丢失或者损坏的，拖拉机所有人应及时向拖拉机管辖地农机安全监理机构申请补发或者换发。
The safety frame is convenient to install, disassemble and pack, and can further improve the passing-through performance of the tractor.
本实用新型具有装卸、包装方便，能进一步提高拖拉机通过性能的特点。
The safety agency did not identify the Tesla driver who was killed when a tractor-trailer turned in front of the car.
公路交通安全局没有披露特斯拉驾驶者的身份。车祸发生时，有一辆大卡车在特斯拉前面转弯。
The safety agency did not identify the Tesla driver who was killed when a tractor-trailer turned in front of the car.
公路交通安全局没有披露特斯拉驾驶者的身份。车祸发生时，有一辆大卡车在特斯拉前面转弯。
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