Packing : packing contains corrosion inhibitor to avoid stem pitting . stuffing box is deep , assuring long packing life.
填料：填料内含防腐剂，避免锈蚀阀杆。深度填料函确保较长的填料使用寿命。
Packing : packing contains corrosion inhibitor to avoid stem pitting . stuffing box is deep , assuring long packing life.
填料：填料内含防腐剂，避免锈蚀阀杆。深度填料函确保较长的填料使用寿命。
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