The thermos cup of the utility model has a double-sealing function, which can enhance insulation and leakage-proof performances of the thermos cup.

本实用新型的保温杯具有双重密封功能，可提高保温杯的保温的防漏性能。

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Field application results show that the string of double-sealing and single-stick subsection fracturing can meet the demands of pressurization behavior and sand amount.

现场施工效果表明，双封单卡分段压裂管柱在承压性能及过砂量要求上，能满足要求；

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Usage: suitable for double coils open armature iron core sealing after wire embedded.

用途：本机适用于双圈开口电枢铁芯嵌线后的封口。

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