When a weld symbol is centered on the reference line, this indicates ?当一个焊缝符号位于参考线的中心时,这表示:

A、
that the welder can put the weld on either side 焊工可以在任一侧施焊焊缝
B、
that there is no side significance 那一侧是不重要的
C、
that the designer doesn’t know where the weld should go设计师不知道焊缝应置于何处
D、
that the welder should weld in whatever position the weld is in焊工应在焊缝所在位置焊接
E、
none of the above 以上都不是