... shape, small size, light weight, flow range, measurement accuracy, high sensitivity, safety and reliability Domestic Diaphragm Gas Meter:1. Applicable to ... and easy maintenance.Standards: GB/T6968-2011 Diaphragm Gas Meter Flow directionFrom Left to rightA (Diameter center Distance)130mmB225 ... & technology Co.,Ltd is the only commercial gas meter supplier in Shanghai Expo 2010, we can provide OEM ...