Block piece, butt joint auxiliary device and butt joint system

The invention discloses a block piece, a butt joint auxiliary device and a butt joint system. The block piece comprises a block piece body and a buffering device, wherein the buffering device comprises a stretchable portion, the block piece body comprises a first face and a second face which are opp...

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1. Verfasser: DONG SHUCHAO
Format: Patent
Sprache:chi ; eng
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