CL-2-2 type is made of two path configurations with the measuring bores ranging from DN50~DN500 and the conventional working pressure covering from 0.1 MPa to 42MPa which is suitable for natural gas trade and Transit transfer metering, especially for the metering of high pressure and sub-high pressure gate stations for natural gases as well as city gases; Besides, the product is also applicable for the custody transfer metering for the terminal users of high pressure gas storage and large industries.