"the rod will readily pivot on the high spots and turn or sag down" metrol.

[marchlo]

Речь идет о проверке параллельности изм.поверхностей микрометра. Помогите, пож., это выражение перевести!

The next test of a micrometer's reliability should be that of parallelism and flatness of the measuring surfaces,
For a quick test of parallelism use a pencil size steel rod, preferably with a very smooth ground or lapped surface. Catch the rod lightly between anvil and spindle near one end of the rod. Tip the micrometer and rod into horizontal position, the rod will readily pivot on the high spots and turn or sag down if it is held in the micrometer.