In 2014, the national main business revenue of the lighting industry was 6.96, which was higher than the average profit rate of the light industry's average main business income of 0.69 percentage points. From the comparison of small industry categories, the accumulated profit margin of the main business of electric light source manufacturing is 7.3, which is higher than the other two categories. In 2014, the national lighting industry accumulated the main business income profit rate industry small category comparison from the perspective of holding type, collective holdings accumulated the main business income profit rate of the highest, 13.12; followed by private holdings, the cumulative main business income profit rate of 7.4 Both are above the industry average. In 2014, the national lighting industry's cumulative main business income margin rate control comparison from the regional comparison, Hainan, Gansu, Henan, the national lighting industry accumulated the top three profit margins of the main business income. Among them, the top three regions in the electric light source manufacturing cumulative main business income profit rate are Henan, Sichuan and Hebei. According to the scale of the enterprise, the profit rate of the main business income of large enterprises is 8.84, the profit rate of the main business income of medium-sized enterprises is 7.21, and the profit rate of the main business income of small enterprises is 5.73. 2014 National Lighting Industry Accumulated Main Business Income Profit Rate Firm Size Comparison
Chlorine Test Strips
The national standard is, factory water ≥0.3ppm, pipe network terminal water ≥0.05ppm;
The residual chlorine value is too high, and the stench of chlorine in the water will be very strong, which will not only stimulate the human respiratory system and eyes, but also may lead to allergies in many people.
The residual chlorine value is too low, the disinfection effect cannot be guaranteed, and the bacteria content in the water exceeds the standard, endangering human health.
Algae can also multiply rapidly, turning the water green and muddy, and accelerating pollution.
State regulations, swimming pool residual chlorine content in 0.3-0.5mg/L.
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