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Design features：

Pure copper design, self sealing design and special sealing accessories are adopted among all parts, without glue and raw tape, which makes maintenance, disassembly and cleaning more convenient; The pressure gauge adopts stainless steel anti-seismic design, and the core filter element adopts a customized stainless steel filter cover with 70-100um filtering precision, so as to completely eliminate the leakage of solenoid valve caused by cylinder impurities.