1. First simple, then complex. Solve the problems that are easy to solve first, and then solve the problems with greater difficulties. Don't get stuck in a difficult problem at the beginning.

2、先外后內。優先對暴露在外面，易接觸、易拆卸的部件進行檢測，然后再對不易接觸和拆卸的部件進行檢測。

2. First outside, then inside. Firstly, the exposed, easily accessible and easily disassembled parts shall be inspected, and then the parts that are not easy to be touched and disassembled shall be inspected.

3、先熟后生。對常見的攪拌車故障部位先進行檢查，往往可迅速確定故障部位，省時省力。

3. Ripen first, then raw. The common fault parts of the mixer truck are checked first, which can quickly determine the fault location and save time and effort.

4、先靜后動。這里的“靜”是指不啟動的靜止狀態；“動”是指啟動發動機后的工作狀態。不要盲目啟動汽車，應先做必要的安全檢查和電氣性能測試（看有無漏電、打火或短路處），然后再啟動工作，可保證汽車的安全。

4. First static, then dynamic. Here, "static" refers to the static state without starting, while "dynamic" refers to the working state after starting the engine. Do not start the car blindly. Do necessary safety inspection and electrical performance test (to see if there is leakage, ignition or short circuit), and then start the work to ensure the safety of the car.

5、先電源后負載。電源故障是最常見的故障之一，因此電氣部分出故障后一般應首先檢查電源部分。

5. Power supply before load. Power failure is one of the most common faults, so the power supply should be checked first after the electrical part fails.

6、先一般后特殊。先檢查一般故障，再查特殊故障。

6. First general, then special. First check the general fault, then check the special fault.

7、先公用后專用。要先解決公共性的問題和各部分所共有的問題，后解決個別性和專用電路的問題。

7. Public use first and then private use. We should first solve the problems of commonality and common problems of all parts, and then solve the problems of individual and special circuits.

8、分段檢查。分段檢查攪拌車是指在故障診斷中，對懷疑有攪拌車故障的系統，逐段進行檢測分析，直至查找到攪拌車故障點。

8. Section inspection. Section inspection of mixer is to detect and analyze the system suspected to have mixer fault section by section in fault diagnosis until the trouble point of mixer is found.