| 41. | Measurement of airborne noise emitted by machines ; enveloping surface method ; metal working machines , circular sawing machines
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| 42. | Industrial fans - determination of fan sound power levels under standardized laboratory conditions - enveloping surface method
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| 43. | Noise emitted by vessels on inland water - ways and harbours ; enveloping surface method for the determination of the sound power level
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| 44. | Measurement of airborne noise emitted by machines ; enveloping surface method ; turbogenerator sets for use in thermal power stations
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| 45. | Measurement of airborne noise emitted by machines ; enveloping surface method ; woodworking machines ; single blade circular saw benches
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| 46. | Measurement of noise emitted by machines ; airborne noise measurement , enveloping surface method ; electrical switchgear and control gear
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| 47. | Measurement of airborne noise emitted by maschines ; enveloping surface method ; woodworking machines ; multi - blade circular sawing machines
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| 48. | Measurement of airborne noise emitted by machines ; enveloping surface method ; shunting trolleys with friction - wheel and or gearwheel drive
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| 49. | Measurement of noise emitted by machines ; airborne noise emission ; enveloping surface method ; hydraulic assemblies test report specimen form
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| 50. | Measurement of airborne noise emitted by machines ; enveloping surface method ; metal processing machine , tools special , stipulations for lathes
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