Legal analysis
If the flow rate is much lower than the minimum flow rate to ensure accuracy, it will lead to no output (such as vortex flowmeter) or the output signal is treated as a small signal to be cut off (such as differential pressure flowmeter), which is unfavorable to the supply side, and there is a loss of justice. In order to prevent the loss of benefits, for a specific set of thermal energy measurement equipment, supply and demand sides are often based on the range of flow measurement and the range of degrees that can be achieved, agreed that a first-class value for the "agreement on the lower limit of the flow", and agreed that if the actual flow rate is less than the agreed value, in accordance with the lower limit of the flow rate charges. Measurement of the people's government above the county level administrative departments can set up measurement and verification institutions, or authorized other units of measurement and verification institutions, the implementation of mandatory verification and other verification, testing tasks. The implementation of the preceding paragraph of the calibration, testing tasks of the personnel, must be qualified by the examination. This function is usually realized in the flow display meter. Measurement of the local people's government at or above the county level in accordance with the needs of the region, the establishment of social common measurement standard instruments, by the higher people's government measurement of the administrative department to preside over the assessment and qualified for use. Enterprises, institutions according to the needs of the establishment of the unit can be used in the measurement of standard instruments, the highest measurement of its various standard instruments by the relevant people's government measurement of the administrative department to preside over the assessment of qualified for use. Metrological verification should be in accordance with the principle of economic rationalization, local and nearby. Measurement verification must be carried out in accordance with the national measurement and verification system table. National metrological verification system formulated by the State Council metrological administrative department.
Legal basis
"People's Republic of China *** and the State invoice management measures" Article 16 _ application for the purchase of invoices of units and individuals shall apply for the purchase of invoices, to provide the operator's identity card, tax registration certificate or other relevant certificates, as well as financial seals or invoices of the seal impression of the competent tax authorities after examination and issuance of invoices to the purchase book. Purchase of invoices units and individuals should be approved by the invoice purchase book type, quantity and purchase of invoices to the competent tax authorities to purchase invoices.