Our company has been producing oxygen bar flow meters for ten years since 2000. Especially since 2003, our oxygen bar flowmeter has received recognition from a large foreign company. During our cooperation, we encountered many difficulties due to the demanding requirements of our customers for the product. However, we did not give up and instead took it as an opportunity for us to learn. We persevered and overcame difficulties. Through continuous research, summarization, improvement, and perfection, we found a relatively mature path from production equipment, tools, production processes, production techniques, to testing methods, etc., which greatly improved the quality of our products. The oxygen bar flowmeter we produce is reliable and superior in terms of material selection, product accuracy, product appearance, printing of scale lines, and so on. In terms of product quantity, it has also formed large-scale production, with an annual output of up to 200000 units.