Note: for rough description of the inside of an angular valve, the process of manufacturing an angular valve is divided into red and one-sided casting, and the visual recognition of a red film is smooth and the casting is rough. Angular valves are sold on the nine pastoral line as castings (described later). The processes vary from one internal to another and are essentially manufacturing processes, and friends who are not aware of the manufacturing process do not use this as a basis for judging quality. Our horn valves are the main copper, grade 10 plating, ten-year quality assurance, and product performance and quality. If you mind if the inside of the horn is not smooth, please be careful
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