cell phone jammer is within the specific time

 It is of the quality inspection or performance detection of cell phone jammer 
During arc welding, you must wear eye protection goggles or protective helmets. In recent years, developed a new type of protective helmets, can change with the incident UV intensity transmittance of the film of the goggles. Close to the welding site in order to protect the welder, welding job site often use semi-transparent protection screen enclosed. These protective screen is usually made of PVC plastic curtain to protect nearby unrelated persons from the arc generated by high-intensity ultraviolet radiation, but to protect the screen can not completely replace the goggles and helmet [40]. The welders are also subject to the threat of dangerous gases and spatter material. Such as flux cored arc welding and manual metal arc welding processes produce smoke contains a variety of oxides. 5mW to 30mW of  cell phone jammer normally has the function of laser indication.
May cause occupational class of metal fume fever. Small particles in welding fumes also affect the health of workers, the smaller the particle size, the greater the harm. In addition, many of the welding process produces harmful gases and smoke, common such as carbon dioxide, ozone and heavy metal oxides. These gases are harmful to the operator with no experience and effective ventilation measures. Is worth noting that, a lot of protection adopted by the welding process gas and raw materials are flammable and explosive, the need to adopt appropriate protective measures, such as control of the content of oxygen in the air, and separate the flammable and explosive materials pile up [41] . Welding smoke extraction equipment commonly used to pumping the bulk of harmful gases, and high efficiency baffle air filter to filter.  cell phone jammer  is within the specific time.
Economic and development trends of the economic costs of welding is an important factor of industrial applications. Welding the cost of many factors, such as equipment, manpower, raw materials and energy costs. Welding equipment costs vary widely for different processes, manual metal arc welding and gas welding relatively low-cost, laser welding and electron beam welding the higher cost. Due to the high cost of some of the welding process, it is generally used in the manufacture of important components. Automatic welding equipment and welding robot equipment costs are also high, so their use is limited accordingly. The human cost depends on the welding speed, hourly wages and total working hours (including welding and subsequent processing). Normally, focusable power of 50mW of cell phone jammer can be adjusted to burn the match.