Get the correct tools to open the containers for these materials.

To open the containers for these materials, suitable tools must be used.

The appropriate tools should be selected to open the materials, the containers is inside the materials.

The inappropriate tools should be selected to open the containers, the containers is made in the materials.

正确答案：A

Solenoid valves shall be shown with a notation indicating whether the valve is spring-loaded to the open or closed position.

Arrows shall be used to indicate flow direction when needed to understand the schematic diagram.

Make sure that the wire is in the position to cause the parts to lock.

Before you put new oil in the system, it is mandatory to replace the filter.

In this example, we calculated the data applicable only to a Type B unit.

Replace components that are worn more than the maximum limits.

The lower seal comes into view when you pull the lower bearing down.

初始表面涂饰和新表面涂饰之间不应有视觉差异。

为避免污染，必须在非常清洁的环境里执行该任务。

等第一层油漆完全干透后再涂第二层。