Caution: Exercise care to prevent purple primer or solvent cement from running back in the valve to the diaphragm or seating area.
警告：要小心谨慎操作，避免紫色底漆或液状粘固剂流回到阀门内的隔膜或密封区域。
Caution: Exercise care to prevent purple primer or solvent cement from running back in the valve to the diaphragm or seating area.
警告：要小心谨慎操作，避免紫色底漆或液状粘固剂流回到阀门内的隔膜或密封区域。
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