词汇	平均螺距
释义	平均螺距 mean pitch
随便看	air-tight cover airtight culture Air-tight deoxygenation airtight design airtight door air tight door air-tight door air-tight double glazing window air-tight drainage air-tight drum airtight enclosure air tight equipment air-tight fabrics air-tight frame airtightness air-tightness measurement air-tightness of automobile air-tightness or water-tightness airtightness test air tightness test Air tightness test for t air-tight ohmic-resistance heating airtight oil box airtight package airtight packing