根据JB4708—92《钢制压力容器焊接工艺评定》的规定，当试件母材金属的厚度大于20mm时，应进行（）。
Nowadaysitismoreconvenientandeasierforpeopletotraveltoothercountries.Doyouthinkthepositiveeffectsexceedthenegativeeffects?
Youcanreceiveaspecial15%discountonordersplacebeforetheendofDecember.
Shonasaysthatinherquestionnaireheraimwas____.
严厉惩处违反交规的人是良好交通秩序的保证。
Wehopedthatthisdisputecanbesettledthroughfriendlynegotiationwithoutbeingsubmitforarbitration.