Each packing ring individually inserted and compressed for better tightness.
Each packing ring individually inserted and compressed for better tightness.
每个垫圈都分别穿入并经过压紧以提供更好的紧固性。
Each packing ring individually inserted and compressed for better tightness.
每个垫圈都分别穿入并经过压紧以提供更好的紧固性。