At present, long optical flat is still mainly adopted as calibrating benchmark in straightness measurement, whose accuracy is not so high (especially in measuring great-size parts).
Furthermore, a method to test the fiber straightness is proposed, and some factors affecting the straightness are also discussed.
The optical properties of doubling the measurement accuracy using the cube-corner retroreflector which is applied to laser straightness measurement are analyzed in theory.
Efficacy: special straight silky formula can prevent coarseness and curl which caused by damp season, smooth the curl hair, give prominence to the straightness, make your hair natural straight but not crudity, natural silky the whole day!
Based on the alignment measurements such as level meter, gradienter and laser collimator, the instructional software for straightness measuring and evaluating is developed.
Welding techniques shall be selected to ensure that specified tolerances for straightness and out-of-roundness are not exceeded.
The turned-in toes, the hand position, the straightness of the body. The attention to the most basic skill.
Stem and packing chamber walls. Close roundness, straightness and superior 8–16 RMS or burnished surface finish.
The invention discloses a hot-rolled steel air cooling and stacking method capable of reducing bending of a rail to ensure straightness of the straightened rail to meet standard requirement.
The effects on straightness measurement are analyzed for the cube-corner retroreflector with angle errors, surface errors, yaw, pitch and roll.
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