Tissue of bile duct wall in group D had chronic proliferation inflammation.

D组胆管壁组织呈慢性增生性炎症改变。

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Impurities gathered in the duct wall affected the cooling effect of coal gas primary cooler.

我厂的煤气初冷器因管壁上结积杂质而影响其冷却作用。

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Results After bile duct obstruction, the bile duct wall presented with epithelial necrosis, fibrous tissue proliferation and thickening.

结果胆管梗阻后，胆管黏膜上皮坏死脱落、纤维结缔组织增生、管壁增厚。

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There's a second alternative: A growing number of New Yorkers are going for duct-free AC systems that involve a small, wall-mounted indoor fan powered by a separate outdoor unit the size of suitcase.

WSJ: Ugliness for All

Improvements could include attic and wall cavity insulation, high-efficiency windows and appliances, duct-sealing, or rooftop solar.

FORBES: California Program Eliminating Upfront Cost Of Energy Upgrades To Launch For Businesses