Special regulations. 742-507-36. Inspection of supplies and equipment: Serviceability standard for cover, insulating, for airplane smoke tanks, M10, M33, AN-M33A1; pump, airplane smoke tank, M2; skid, barrel, 10-foot, M1; stand, barrel, M7; stand carrrying, M1; stand, loading, airplane chemical spray tank, M2; stand platform, airplane smoke tank, M6; stand, platform, airplane smoke tank, M6A1; stencil, insignia, Chemical Corps, small; and stencil, insignia, Chemical Corps, large; tripod, drum hoisting. M1; wrench, valve removing M1 and M2; Feb. 18, 1952.