With the implementation of new environmental protection standards, the kiln tail smoke dust concentration is required to be less than or equal to 50mg/m3. The coastal economically developed areas even require the kiln tail smoke dust concentration to be less than or equal to 10mg/m3. Therefore, the -----
In the middle and late 19th century, the success of the British industrial revolution promoted the development of productivity and scientific experiments, and also promoted the development of vacuum technology. In 1850 and 1865, a mercury column vacuum pump and a mercury drop vacuum pump were inve-----
Example 1: Household liquefied petroleum gas is liquefied by using a compressed gas volume at normal temperature, and stored in a steel tank, the same as a liquid lighter. Liquefied oxygen is collected according to the boiling point of the gas, and is separated after reaching various boiling point-----
Researchers at the University of Portsmouth in the United Kingdom have found that fat people react more sensitive to food tastes, and that they can obtain more pleasure from tasting, which may lead to excessive eating. The researchers divided 40 undergraduate students into obese and non-obese gr-----
The simple renovation of the old house is nothing more than a brushed wall paint door. How long does it take? Netizen 1015055ailele recently refurbished the old house, detailed records of the renovation of the walls of the home, cabinets and door painting of the five-day process, we quickly came t-----
Abstract The new diamond drill bit independently developed and designed by Shengli Oilfield Drilling Institute has recently reached a maximum of 276 meters in the upper section of Shashichun in the Yanshui 229 well of Shengli Oilfield, creating the highest record of the drill bit of the sands-----
How about a black leather sofa ? In current family life, most people have sofas in their homes. The sofas are divided into leather sofas, fabric sofas, and other kinds of sofas. Of course, the most common ones are leather sofas and fabric sofas. Species. In the use of sofas, the use of sofas will -----