secondary member
... 主要构件 primary member 次要构件 secondary member 一种构件 kindred member ...
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次要强度构件 secondary stiffener
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发生这许多裂纹是因为把这些坡口焊接部件作为次要构件或附件考虑。
A large number of these cracks occurred because the groove welded component was considered a secondary member or attachment.
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