童雄，厚平筏板基础冲切破坏性能研究。

Analysis for punching shear failures character of thick flat raft foundation.

youdao

风管生产线是由上料架调平压筋机冲尖口和冲方口油压机液压剪板机液压折边机所组成。

Line consists of a feeding metal frame, leveler grooving roller, hydraulic notch and punch square machine, hydraulic shearer and folder.

youdao

风管生产线是由上料架调平压筋机冲尖口和冲方口油压机液压剪板机液压折边机所组成。

Line consists of a feeding metal frame, leveler grooving roller, hydraulic notch and punch square machine, hydraulic shearer and folder.

youdao