| 摘要 |
FIELD: metallurgy.SUBSTANCE: steel coil spring in resilient loaded condition, that is rather lower the elastic strength, is subjected to pulse sub-sonic air flow with frequency 1130-2100 Hz, and sound pressure 120-140 dB, at room temperature, and upon its location across the air flow.EFFECT: increased elastic characteristics and widening of nomenclature of treated items. |
