quick-acting self-closing gate valve的意思|示意
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快速自闭闸阀
quick-acting self-closing gate valve的网络常见释义
速动自闭闸阀 ...力式调节阀 Self-acting type temperture control valve 自力式温度调节阀 quick-acting self-closing gate valve 速动自闭闸阀 ..