... 双闸板式闸阀 double-disc type gate valve 双闸阀 double gate valve 双闸进料器 double-gate airlock ...
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double-gate valve 双道闸门阀
double disc gate valve 双圆板闸阀
double-faced slide gate valve 两面滑门阀
double faced sluice gate valve 两面遮断阀
Double Flap Gate Valve 双层翻版阀
double-disc type gate valve 双闸板式闸阀
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