... casing joint 套管连接；一节套管 casing knife 套管割刀 casing landing 套管联顶 ...
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The utility model comprises a casing body, a knife head seat, an electric cutting button switch, an electric coagulation button switch, and a circuit plate.
本实用新型包括壳体、刀头座、电切按钮开关、电凝按钮开关和电路板。
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