求人工翻译一小段话,较复杂,机械方面的专业英语.

Coordinates of the stress tensor 应力张量的坐标系
at extreme values of von 在von的极值
Misses stresses in the points of BW body structure 在BW结构点上缺失应力
on diameters D2 and D3 (on which are measured values of welding residual stresses)
在直径D2和D3上（焊接残留应力的量值在其上）
during one bucket wheel 一个戽斗水轮期间
speed are shown in Table 2.速度如表2所示
Presented data are necessary in order to carry out the superposition of working stresses and welding residual stresses i.e. to
determine the level of overall stresses in the critical zones of the BW body structure.
提供数据是必要的,以求得工作应力与焊接残留应力的叠加值,如：确定BW结构的关键区域的总应力水平.
注：能力和资料有限,前面的不成句子,只能断成一段一段的来翻译.最后一句还想是个句子,就整体翻译了.
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