Cows purchased from other countries generally have stronger adaptability as long as their natural conditions are suitable. For natural conditions, cows are generally afraid of heat and not afraid of cold. In summer, cows are sensitive to high temperatures, high humidity, and winter winds. The suitable ambient temperature for dairy cows is 50 °C to 21 °C (calf IOoC to 240 °C). The optimum ambient temperature is IOoC to 15 °C (170 °C for calves) and the tolerance range is -150 °C to 260 °C. Temperatures below -15 °C, especially above 26 °C, feed intake and milk production decreased, compared with the temperature of 150C, the temperature is higher than 260C, milk production decreased by 25%. The temperature is higher than 350C and milk production is reduced by 50%. The relative humidity of air is 50-70%, the relative humidity in summer is more than 75%, the milk yield is obviously decreased, the winter wind force reaches 5 or more, and the milk production is obviously decreased. In addition, heatstroke is prone to occur in the summer with high temperatures and high humidity. In particular, prenatal and postpartum cows are more prone to occur.
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1. Indoor devices: such as speakers, sockets, chargers, lamps, picture frames. The micro camera is ingeniously placed in these objects, so as to monitor the home environment and protect the personal and property safety in the home.
2. Personal jewelry shape: watch, glasses, tie, lighter, badge. The camera is made into the shape of an ornament, which can facilitate secret visits and recording.
3. Form of articles for daily use: tissue box, beverage can, car key, light switch, row plug, alarm clock, flashlight. The camera of this shape can be placed at the position for monitoring at will.
Distinguish from functions:
1. Common linear type
2. Wireless transmitting type
3. Infrared night vision type
4. Ultra long distance transmission type
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