The models that B2 driver's license can drive are heavy and medium-sized trucks or large, heavy and medium-sized special operation vehicles. Most of the heavy and medium-sized trucks are mainly trucks. For example, the large trucks that we often see on the road are heavy trucks. Large, heavy and medium-sized special operation vehicles refer to vehicles equipped with special equipment or appliances, such as sprinkler, concrete mixer, fire truck, etc.

混凝土攪拌機是用來運送建筑用混凝土的專用卡車，由于它的外形，也常被稱為田螺車。這類卡車上都裝置圓筒型的攪拌筒以運載混合后的混凝土。

Concrete mixer is a special truck used to transport construction concrete. Because of its shape, it is often called snail truck. Such trucks are equipped with cylindrical mixing drums to carry the mixed concrete.

它主要由攪拌筒及其輔助支撐部件組成，攪拌筒是混凝土的裝載容器，它是由耐磨薄鋼板制成，為了能夠自動裝、卸混凝土，其內壁焊有特殊形狀的螺旋葉片。

It is mainly composed of mixing drum and its auxiliary supporting parts. The mixing drum is a concrete loading container. It is made of high-quality wear-resistant steel sheet. In order to automatically load and unload concrete, its inner wall is welded with spiral blades of special shape.

自動上料攪拌機駕駛員崗位職責：

Post responsibilities of automatic feeding mixer driver:

1、熟悉水泥攪拌車性能，必須持證上崗，崗前禁止喝酒，酒后禁止上崗，以確保行車；

1. Be familiar with the performance of cement mixer truck and must work with certificate. It is forbidden to drink before work and after drinking, so as to ensure driving safety;

2、每工作班前檢查車內儀表，油料是否正常、充足，剎車是否良好，混凝土罐車是否保持干凈，是否有存水未放完等，嚴禁帶病出車；

2. Before each work shift, check the instruments in the vehicle, whether the oil is normal and sufficient, whether the brake is good, whether the concrete tank truck is kept clean, whether there is water storage, etc. it is strictly prohibited to leave the vehicle with disease;

3、運輸前，應檢查混凝土罐車密封性，運輸過程中，車輛應勻速行駛，車輛拐彎時，應提前減速，從盤裝料開始開始卸料為止宜控制在一個小時內；

3. Before transportation, the tightness of the concrete tanker shall be checked. During transportation, the vehicle shall drive at a uniform speed. When the vehicle turns, it shall slow down in advance. It should be controlled within one hour from the beginning of the first batch of loading to the beginning of unloading;

4、嚴格按照行車路線行車，保證行車；

4. Drive in strict accordance with the driving route to ensure driving safety;

5、出站時注意左右來車，運送中遵守交通規(guī)則，運到澆注地點應服從指揮，停留位置恰當，穩(wěn)妥，能夠滿足施工需求，到達工地后，禁止停車熄火；

5. When leaving the station, pay attention to the vehicles coming from the left and right, abide by the traffic rules during transportation, obey the command when transporting to the pouring site, stay in an appropriate and stable position, and can meet the construction needs. After arriving at the construction site, it is forbidden to stop and turn off the engine;

6、服從站內調度人員，現(xiàn)場服務人員的調度。

6. Obey the dispatching of station dispatcher and field service personnel.