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本发明涉及一种刀型闸阀,尤其涉及一种明杆刀型闸阀。
The invention relates to a knife-shaped gate valve, in particular to a rising stem knife-shaped gate valve.
youdao
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本发明涉及一种刀型闸阀,尤其涉及一种明杆刀型闸阀。
The invention relates to a knife-shaped gate valve, in particular to a rising stem knife-shaped gate valve.
youdao