Gem Bids For Gate And Parallel Slide Valve Grinding And Lapping Machinesize Range- 15mm To 65mm, Gate And Parallel Slide Valvegrinding And Lapping Machine Size Range- 80mm To 150mm, Gate And Parallel Slide Valve Grinding And Lappingmachine Size Range- 200mm To 350mm, Gate And Parallelslide Valve Grinding And Lapping Machine Size Range-300mm To 600mm, Gate And Parallel Slide Valve Grindingand Lapping Machine Size Range- 500mm To 1800mm