based on the work mentioned above , a formula , which represented worker cumulative exposure to vibration was deduced : d = [ ( a2kw ( 4 ) .t ) 1/2.y.d ] 2 furthermore , the dose-response relationship of hand transmitted vibration and prevalence of white finger was computed , the regression equation was : p = 1.0904x - 6.214 2 under precondition of exposure to vibration for 20 years with 90 % of workers having no white fingers , the limit of hygienic standard of hand transmitted vibration in china should be set at 4 hours and as akw ( 4 ) less than or equal to 5 m/s2 based on the regression equation .
C0016129
fingers
C0018563
hand