| 摘要 |
<p>The present invention relates to a press wheel assembly capable of improving reliability on a product by preventing a pipe from being separated due to an earthquake and ground subsidence by hanging a protrusion of a hanging member on one hanging groove among the hanging grooves of a connection bolt and maintaining that the protrusion is hung on the hanging groove as a restoration preventing member presses the hanging member when a connection nut is connected to the connection bolt.</p> |
