1.For grating in the optical pick-up head, the compensability between the longitudinal and transverse error practical references on the manufacture of grating.
对学头栅,其纵向加工误差与横向加工误差间存在的互补性,对栅的具体制作有着实的参考价值。
2.It is shown that test aerospike nozzle has good altitude compensability of thrust.