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API(American Petroleum Institute), established in 1919, is the first national business association in the United States. An important task of the API is to standardize the equipment used in the oil and gas industry to ensure the safety, reliability and interchangeability of equipment used in the
GFS 2020 annual advanced awards successfully concluded in strict compliance with the city, district epidemic prevention and control headquarters circular, order and work arrangements. Strictly implementing the main responsibility for epidemic prevention and control, and effectively doing a good job