【正文】 percritical pressures, the specific heat of water increases with temperature, the specific heat of steam decreases with increasing temperature. (√) Under in subcritical oncethrough boiler evaporating heating surface of multiple values that appear unsteady flow, the main reason is a low enthalpy of evaporating heating surface inlet water. So in thelowload operation must restrict entry low enthalpy of water. (X) the flowofrefrigeraevaporating heating surface of ambiguity existonlyinspiralwallverticatubecoilsdnotexist. √ Evaporation ...education and training. (3) technology can guide operators work on the business, ready to solve engineering problems. (4) the text clearly technical problems with the cards on the table and retain the original information to the persons concerned, good technical approval and visa in a timely manner. 4, data administrator responsibilities (1) is responsible for all the project files, data collection, production, binding, collating, storage (hand) and so on. (2) assist construction project fuck and other technical and engineering quality, safety, and education. (3) to help the staff disclosure of production technology, security technology, and collecting keep written information in a timely manner. (4) with the personnel concerned to carry out the measurement of quality and safety checks, and technical information. (5) according to the data, to the conservation section chiefs will report on the situation. Four job agencies, conservation management to achieve good conservation, achieve a standard, we must establish a sound management system, to ensure smooth progress. Under the unified leadership and management at different levels, to ensure that the concentration of decisionmaking power and unity of mand, and a chain of authority, management at different levels。 fulltime mechanical maintenance group (responsible for watering, cooling, spray during the day), lawn maintenance groups and plant groups. Section with garden plant professional engineer 1, each equipped with the professional technician 1, 2 technicians, carry out their duties. By the Resident Engineer of the conservation section chiefs and marketing grasp work and coordination. After five, lawn maintenance and management of plant construction, often with a 12 lawn maintenance can grow into the fullness of the week. After the lawn grow, but also to carry out regular maintenance and management, to ensure the lawn landscape continues for a long time. Lawn maintenance management including: irrigation, fertilization, pruning, weeding and other links. 1, irrigate irrigation lawn fertility environments can be improved, adding water plant the lawn, is a guarantee of normal lawn. In view of the lawn during the growth season, lawn and the environment is in a State of flux, coordination of water and soil and improving the microclimate of the Center, water cannot be implemented according to a fixed pattern, following a number of technical points for reference. (1) the irrigation time growing season, according to the different periods of precipitation is extremely important and timely irrigation of different grass species. Can generally be divided into three periods: ① turned green before the rainy season. High temperatures during this period, transpiration, water requirements, and is one of the most crucial irrigation under soil water retention properties of strength and rainy periods during which Bush 24. ② largely ceased during the rainy season irrigation. Air humidity during this period, grass transpiration decreased soil moisture content has increased to a level sufficient to meet the needs of lawn growth. ③ to yellowing of the leaf after this period before the rainy season precipitation, evaporation is greater, while the lawn is still in a great stage of life activities, pared with the previous two periods, lawn water requirements increase at this stage, if not timely irrigation, not only affect the growth of grass, also causes yellow. At this stage, according to 45 of irrigation. In short, grass types, water requirements are different, you mustAccording to the climate conditions and plant species to determine irrigation of the lawn. About a day, when irrigation is better depends on irrigation. In theory, the same period as long as the amount of irrigation water is less than the infiltration capacity of the soil, irrigation all the time in a day. Then depends on the irrigation way. If intermittent intermittent spray or spray irrigation (high degree of atomization), irrigation is best with the Sun. Not only can add moisture, but also significantly improve the microclimate and photosynthesis and transpiration and gas exchange, facilitated the coordination of water, air, fertilizer and soil thermal and vegetative organs of root and root expansion, and could lead the entire transit storage of the plant material, breathing, lawns and lush. If using water, irrigation, and so on, should be watching season, early spring, late autumn around the heel as well and the rest take twilight as much. (2) irrigation irrigation quantity should be based on the soil, growing, grass and other factors to determine. General lawn growing season drought period, takes about a week to pay 2040mm。 using ximajin, prometryn, Diuron, closed soil inhibited germination of weed germination or kill weeds。s resistance. Autumn fertilization must be stopped as soon as possible, so as to avoid long, shoot too late lignification, antifreeze. 2, protected crowns and roots. Filling pile of dirt at the root Crown after cold winter water is very effective, usually 2030 cm tall pile of dirt and solid. 3, package. Before the winter with straw or rope ... The following points: ① to select agents, prevent plants from harm. II in the valid range should use low concentrations of pesticides. Should pay attention to using different medicaments to prevent pest resistance. ③ may use high pollution, high residues of drugs and interfere with each other, im