炉膛、U型钢分离器，以及过热器的外壳由顶部支撑、气密、全焊接的膜式管墙构成，因此不需要膨胀节。
The furnace, U-beam separator, and superheater enclosures are constructed entirely of top-supported, gas-tight, all-welded membraned tube walls which do not require hot expansion joints.
很轻的建筑特色建设质量和建筑外壳，提供了良好的空气密封。
The building features a very light construction mass and a building shell that provides excellent air sealing.
外壳为气密型结构，能有效地保护内部机件免受环境影响和污秽侵入。
The body has the airproof structure, can be protect the inner parts dirt or influenced by environment.
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