Regulating the position of the internal steel tube can make the axel of the stay cable and the axis of the embedded tube overlapped.

调节内钢管的位置，能使斜拉索轴线与预埋管轴线重合。

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Disclosed is a pressure dredging device without a rod, mainly comprising a draft tube, a connecting tube, a handle, a compressing ring and a regulating pawl.

一种无杆压力疏通器，主要包括有引管、连管、手柄、压缩圈以及调节爪。

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By regulating the cathode temperature and applying the combined exhaust techniques, the mean time of no-failure operation of this picture tube is lengthened more than four times.

通过调整阴极温度和采用“联合排气工艺”，黑白显象管的平均寿命提高了四倍以上。因此，早期失效的问题基本得到解决。

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