Because the φ20mm threaded steel bar is used in the main body of the tunnel and is used as the main rib, it needs to be inspected and accepted by our engineers. Our engineers are not willing to unload and we are also very difficult
Because the 20mm threaded rebar is used in the main body of the tunnel, is used as the main ribs, the acceptance of supervision, our engineers are not willing to unload, we are also very difficult
Because the φ 20 mm threaded steel bar is used as the main reinforcement of the tunnel and needs the acceptance of the supervisor, our engineers are not willing to unload, and we are also very difficult<br>