1. The following phenomena shall be avoided during use:

⑴ Remove the components of the network at will;

⑵ People jump into or put articles into the net;

(3) A large number of welding sparks or other sparks fall into the net;

(4) Stacking articles in or under the net;

(5) There is serious corrosive smoke around the net.

2. The nets in use shall be inspected regularly or irregularly, and the sundries falling from the nets shall be cleaned in time to prevent the pollution of the nets. When the nets are impacted greatly, they shall be replaced in time.