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caterpillar tractor |
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::Explanation:: |
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1.Caterpillar drive is controlled by direct-connection frequency variation 2.Upper caterpillar adopts cylindar soft compression which can automatically conform to different specs of pipeline and keep good contact pressure with pipeline; lower caterpillar can be adjusted by electricity vertically conforming to specs of pipeline. 3.Adopt v type rubber block with high friction coefficient caterpillar tractor |
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