ordinary ordinary ordinary Price of about 300 or so, the
hot air gun is mainly temperature instability, high and low, air volume and
instability. The scale of the air pressure gun just adjust the size of its
power, so the temperature of raw slowly when the phone is switched on, for
several minutes, and then temperature soared, a little attention will burn out.
Such as amplifiers, CPU, circuit boards, etc. It also has a temperature
detection, it seems only to high temperature protection, adjust the temperature
and unreal. Suggest you not to save money, and often compensate machine.
standard standard standard About after the price, this kind of heat gun
calibration is used to adjust the temperature of the real, warming faster when
the phone is switched on, a few seconds can be reached, and the temperature will
not increase, in close range adjustment, air volume is more stable, applicable
repair mobile phone, I use the air pressure gun is very good, such as: 3508 CPU
won't burn out in more than 90%. Digital temperature display type The basic
performance with those of the second
heat gun, hot air gun ZHE JIANG ULITE TOOLS MANUFACTURE CO.,LTD , http://www.ulitepowertool.com
Reducing Pesticide Residues in Nectarine
The problem of pesticide residues in nectarines has a direct impact on China's export trade and has received much attention in the industry in recent years. Researchers believe that there are four major countermeasures for reducing pesticide residues in nectarines. First, the development of pollution-free nectarines. Pollution-free nectarines, as the government behavior and market access standards proposed by the Ministry of Agriculture, have been gradually promoted in the majority of peach areas in China. From the point of view of pest control, the so-called pollution-free peaches means that pesticide residues in nectarine products are lower than the standards for pollution-free peaches in China by minimizing the amount of pesticides and optimizing control technologies. In the development of pollution-free production, bifenthrin is the preferred choice for the use of a variety of pyrethroid pesticides, because it has good control effect on the main pests of Taoyuan, and can play a role in spraying and curing a variety of pests. Second, comprehensive measures based on agricultural prevention and control will actively guide peach farmers to adopt disease-free pests and seedlings, select disease-resistant seedlings, and appropriately increase organic fertilizers to improve the disease resistance of peach trees. Strengthen peach plant protection and field management in Taoyuan, remove weeds and litter in the garden, and do not give pests production and breeding sites. At the same time, it is necessary to carry out pruning in Taoyuan, and reasonable adoption, in order to cut off branches and diseased branches of the stem borer, and properly cultivate the soil to hinder the emergence of overwintering insects, feathers and other agricultural comprehensive control measures. Third, biological control technology. Biological control has the characteristics of being non-toxic, harmless and environmentally friendly. For example, domestic research on the use of predatory mites to control the biological control technology of peach aphid has achieved certain results. In another example, Indian researchers found that tropical rust is the natural enemy of Taoyuan weeds, which can control the number of weeds. Biological control technology generally does not produce drug resistance, can control hazards in a long-term and low cost, and is an important means for preventing and controlling peach pests and producing pollution-free nectarines. Fourth, physical and mechanical control. Physical and mechanical control is a method of controlling pests by using various physical factors, artificial or instruments, including the simplest manual hunting, destroying the normal physiological activities of pests, and changing environmental conditions so that pests cannot accept and tolerate them. Physical and mechanical control can be used both to prevent pests and as an emergency measure when pests have already occurred.