non-rising stem wedge gate valve的意思|示意
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暗杆楔式闸阀
non-rising stem wedge gate valve的网络常见释义
暗杆楔式闸阀 ... non-rising stem valve 不升杆式阀 non-rising stem wedge gate valve 暗杆楔式闸阀 non-rising stem wedge sluice valve 暗杆楔式闸阀 ...