It is a frame from an I-beam No.
Blocks with round voids are made using vibro stamp. It is a frame from an I-beam No. at the top of the frame at its ends installed vibrators I-7 and the I-I-7 Elepe I-7 provides the transverse vibration of the liners, and the electromagnetic vibrators of the I-85-vibration directed along the liners.
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