该工具将密封部位由井底移至井口，适用于各种规格的大直径套管固井。
The device can move the seal part from the bottom hole to the wellhead.
无需震动，自流脱气，适用于各种形状及部位的施工。
It can flow level and degas without vibration, apply to any position.
适用于缝制各种衬衫，西服或类似服装，特别是其衣领、前襟等部位。
Be suitable for sewing shirt, western type clothes and other clothes similar clothes, especially be suitable for their collar parts.
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