Metal building materials, namely, metal roof curbs for use with wiring, fiber optic lines, conduit, ducting, fire protection, fresh air or forced air louvers, and piping; Metal building materials, namely, metal wall sleeves for use with wiring, fiber optic lines, conduit, ducting, fire protection, fresh air or forced air louvers, and piping

'air':20,23,46,49 'build':2,28 'conduit':15,41 'curb':7 'duct':16,42 'fiber':12,38 'fire':17,43 'forc':22,48 'fresh':19,45 'line':14,40 'louver':24,50 'materi':3,29 'metal':1,5,27,31 'name':4,30 'optic':13,39 'pipe':26,52 'protect':18,44 'roof':6 'sleev':33 'use':9,35 'wall':32 'wire':11,37

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