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Figure 2011-2012 China's metal processing machine tool import volume map According to China Customs statistics, in August 2012, China imported 11,699 metal processing machine tools, an increase of 8.8%, the import value of 1.44 billion US dollars, an increase of 39.8%, the import; The unit price increased by 4.3% from the previous month to US$123,000/set. From January to August 2012, China imported 72,033 metal processing machine tools, down 10.3% year-on-year; the import value was about US$9.05 billion, up 4.8% year-on-year; the average unit price of imports was US$126,000/set. Since 2012, the import volume and import volume of metal processing machine tools in China have increased month by month, but the average unit price has gradually decreased, from the highest record of US$161,000 per unit in January to US$116,000 per unit in March, and increased to April. 119,000 US dollars / Taiwan, in May and June slightly increased at about 120,000 US dollars / Taiwan, in July fell again to 118,000 US dollars / Taiwan, August again increased to more than 120,000 US dollars.R141B,Dichlorofluoroethane (HCFC- R-141b) is a nontoxic and colorless chemical with small ODP value and excellent chemical stability. Since its physical and chemical properties are similar to those of CFC-11 and CFC-113, it can substitute refrigerant R-11 as foaming agent for rigid or soft PU foam without changing process and equipment, or CFC-113 as metal cleaner and solder- remover as well. Refrigerant R-141b has following characteristics:
1. Chemical Stability: It can be stored at room temperature without decomposition.
2. Dissolvability: It can dissolve in most organic solvents, alcohol and ether. It has excellent compatibility with grease and lubricant, and no obvious effects on most polymers including plastics and rubbers.
3. Toxicity: The toxicity trials conducted by Allied Signal and Atochem indicate that it has no irritant effect on hum an skin and eyes, but inhalation of high-concentrated refrigerant R-141b will cause anaesthetic effect.
4. Flammability: HCFC-141b is inflammable, it should be stored in ventilated place without flame.
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ZHEJIANG ZHONGLAN REFRIGERATION TECHNOLOGY CO.,LTD , http://www.uiszl.com