Tender For bid to ras supply of gate and parallel slide valve grinding and lapping machine : : - gate and parallel slide valve grinding and lapping machine size range- 15mm to 65mm , gate and parallel slide valve grinding and lapping machine size range- 80mm to 150mm , gate and parallel slide valve grinding and lapping machine size range- 200mm to 350mm , gate and parallel slide valve grinding and lapping machine size range- 300mm to 600mm , gate and parallel slide valve grinding and lapping machine size range- 500mm to 1800mm