One end of the protective casing is provided with a flaring for the butt-joint of the heat-insulation case.

在保护套的一端设有扩口，用于保温套间的对接。

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One end of the protective casing is provided with a flaring for the butt-joint of the heat-insulation case.

在保护套的一端设有扩口，用于保温套间的对接。

youdao