The spirit level is mainly used for checking flatness of guide ways of various machines and equipments.and horizontality or verticality of installation of equipment. A.  Type    Graduation    0.02mm/m        Unit:mm B.  ration The reading can only betaken as soon as the...

A.       Application    The optical composite image level is idely used in measuring the gradients of flat surface and cylindrical surface to horizontal direction, the planeness and straightness of slideway or base of machine tool or optical mechanical instrument as well as the correctness of installing...