This paper discussed the wreck of the small pole of portal crane is because the small pole supported greater add working stress in range - changing process.
本文论述了门座起重机小拉杆的损坏是由于在起重机变幅过程中，小拉杆承受较大的附加应力所致。
This paper discussed the wreck of the small pole of portal crane is because the small pole supported greater add working stress in range - changing process.
本文论述了门座起重机小拉杆的损坏是由于在起重机变幅过程中，小拉杆承受较大的附加应力所致。
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