Silencing apparatus and equipment, namely, mufflers for use in gaseous ventilation passages and cavities in the internal and external fabric of buildings and infrastructure and manufacturing plants and mines; noise attenuation parts and equipment and apparatus, namely, mufflers for use in the housing and casing and structure of fixed, portable, moving or moveable mechanical devices, namely, ventilation and acoustic apparatus, generators, compressors, pumps, refrigerators, motors, engines, fan...

Silencing apparatus and equipment, namely, mufflers for use in gaseous ventilation passages in the internal and external fabric, structure, walls, partitions, floors, roofs, windows and doors of fixed, portable, moving and moveable buildings and infrastructure and manufacturing plants and mines; noise attenuation parts and equipment and apparatus, namely, mufflers for use in the housing and casing and structure of fixed, portable, moving and moveable mechanical devices, namely, generators, co...