确保在滑油中没有金属粒子。

Make sure that there are no foreign particles in the oil.

Make sure that there are no metal particles in the oil.

Make sure that there are exempt metal particles in the oil.

正确答案：B

Bend the pipe to the correct radius.

Count the number of treads on the tire.

Hydraulic fluid can cause corrosion.

The related caution light must go off after 30 seconds.

For ease of reference, these dividers shall be staggered.

The information to be included on the cover will be left to the manufacturer＇s discretion.

All publications shall use the standard numbering system for indexing and assignment of subject matter.

Pages of permanently bound handbooks need not be dated.

Subparagraphs and other pertinent information, such as a list of figures, may be shown in the table of contents of the section.

The AC power system design prevents two sources to the same load at the same time.