如题 7 m0 G+ D' M! {) }. V9 n
QW-219.1 中2 t |- b5 x: e7 Y( [0 Q
if it is desired to provied tolerances in the WPS for two variable,the firt variable with a tolerance shall be set at the midpoint of its tolerance and twotest coupons shall be welded with each of the upper and lower extremes of the tolerance for the second variable(i.e.,four counpons must be welded) . . F6 p* Q/ ~" D# k请问四个试件是第一个变素处于允许偏差的中间值,第二个变素处于允许偏差的最大值和最小值各焊接两个试件吗?
发表于 2011-3-21 06:03:53