下载资料：
Wear resistant ring structure is added at both ends of the spool to make the spool more stable in the switching process and increase the service life; Sealing ring imported from Japan, optimize the inner flow channel, maximize the flow area; The pilot seat adopts Taiwan imported seat, the surface is provided with 5 decorative ribs; Manual rod strength is good, the appearance is more characteristic (has applied for the appearance patent); Body surface adopts new environmental protection technology; Assembly using automatic assembly test line, product consistency is good.
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