Class A boiler manufacturing inspection and testing equipment

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1. Article 11(3) of the Conditions for Boiler Manufacturing Licensing (Guo Jian Zhi Guo No. 194): Testing and testing equipment: Equipped with metrological devices that meet the standards for length, temperature, force, and electricity measurement, or with a fixed system for value traceability. What does this sentence mean? Does it refer to whether instruments such as rulers, thermometers, and pressure gauges need to be calibrated? 2. Rules for the supervision and management of boiler installation and modification units – Appendix 2: Basic requirements for the tools and testing equipment of boiler installation and modification units. What kind of equipment is referred to as “thermal instrument testing equipment”? Do you mean devices such as pressure gauges, level gauges, and thermometers? I hope teachers who are knowledgeable will kindly offer their guidance. Thank you so much!