文档介绍：安全帽标准(Helmet standard)
People's Republic of China national standard GB 2811-89 safety helmet 1 subject matter and scope this standard specifies the physical properties of the safety helmet industry use requirements, technical requirements and inspection rules, management, marking and packaging. This standard applies to industrial helmets which are normally used, while other special features are applicable only to the appropriate special locations. 2 refer to standard GB1410 - 78 test methods for solid electrical insulation materials, insulation resistance, volume resistance coefficient and surface resistance coefficient. 3, the term "safety helmet" is a cap that protects the head of the human body from external forces. It consists of a hat shell, a hat lining, a lower belt and a back hoop and so on. The shell of the shell of the safety helmet comprises a visor, brim, top bar, air hole, socket, plug lining hole and a chin strap hanging seat etc.. The visor cap shell extend the front part. The brim cap shell around the protruding part except the visor outside. The part of the top reinforcement used to increase the strength of the top of the cap. The blowhole at the vent cap. Insertion strueture for socket cap shell and cap lining and accessory. The connecting hole is connected with the cap lining and the opening of the cap case. A general term for an inner par t of a head around a head, including a cap, st rap, st rap, st rap, swea t band, gaske t, and cord. With a circle around the head circumference of the cap hoop part for fixation. A band that carries direc t con tact with the head. A cord (band) that connects a belt and a belt, a cap and a shell. A sweat absorbing mat erial wrapped around a cap hoop. Cushion pad bet ween cushion cap and cap. The back hoop is provided with an adjustable hoop at the back of the cap hoop. A union join t; a joi nt bet ween a cap lining and a cap case. A band attached to the chin. Lock the card under the chin with the length of the f