https://youtu.be/2Spj8_ED0TA?t87
https://youtu.be/2Spj8_ED0TA?t87
To jakis jednokierunkowy beton, czy pierwsze obciazenie go naruszylo ?
P.S.
https://youtu.be/JyA1lBJl_qM?t17
https://youtu.be/JyA1lBJl_qM?t17
J.
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