NF M81-676:1998 Coal mine equipment. Troughed belt conveyors for loose bulk materials. Pulley covers used underground and for above ground. Specifications. Characteristics. Test methods. Acceptance testing.
1998NF M81-676:1998 Coal mine equipment. Troughed belt conveyors for loose bulk materials. Pulley covers used underground and for above ground. Specifications. Characteristics. Test methods. Acceptance testing.