Radiographic examination was performed with portable X-ray fault detector appling the special radiographic technique for fillet weld of heat exchange tube-tubeplate.

用普通便携式X射线机，采用特殊的透照技术，对换热管与管板角焊缝进行射线检测。

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The machine mould antrum is made of special ainico main plate with good efficiency for high heat exchange , top class anti-extension and can be use for a long time.

机器模腔表面采用特制铝合金板，热传导效率高，抗拉强度好，寿命长。

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