At the same time, indoor drying also has an impact on household items, which is easy to lead to dry crack and deformation of wood structures such as solid wood furniture and musical instruments. At the same time, it is also easy to cause static electricity and damage electronic products such as computers and electrical appliances.
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It is reported that the development of the propeller has overcome the sealing of large diameter boring shaft deep water seal, large diameter multi-channel gas-liquid rotary joint, the alignment installation of super large diameter lifting cylinder and rotary cylinder, propeller driving device and lifting cylinder The alignment of the alignment, the installation of the lubrication cooling circulation system, the alignment of the main drive clutch, and the adjustment of the lifting system, successfully broke the international monopoly and filled the domestic gap. 
Among them, the first 3800 kW propeller was off the assembly line at the end of February this year. After the two propellers have been fully installed and tested, they will be installed on the world's largest 12,000-ton full-slewing self-propelled floating crane "Zhenhua 30", which will provide power for the self-propulsion and positioning of the 44,000-ton wheel.
Increasing indoor humidity can moisten the dry air, and the moisture in the air can also be combined with the floating smoke and dust in the air to precipitate it. It can also reduce the paint smell, mildew smell, smoke smell and odor to a certain extent, so as to make the air more fresh.
Humidification can also moisturize the skin, promote blood circulation and metabolism of facial cells, relieve nervous tension and eliminate fatigue.
According to experts' experiments on the comfort of human activity environment, people feel most comfortable when living and working in an environment with relative humidity of 40% - 60%, and the work efficiency is also high. At this time, the air also has a good protective effect on furniture and decoration.
Some plants can be placed when the indoor air is dry. It is recommended to choose tiger tail orchid, aloe or Chlorophytum, which can release oxygen at night. Don't put too much in the bedroom. You can sprinkle some water on the leaves of plants.
If you want to better solve the problem of indoor dryness or the indoor air is too dry, it is recommended to use a humidifier. This is a relatively simple method. You can directly use tap water when choosing fog free humidification products. Remember not to add essential oils or fungicides in the humidifier indiscriminately. Sometimes adding things indiscriminately will have an adverse impact on your health, It is easy for bronchitis and lung diseases to appear!
On August 12, 2017, the second 3800 kW propeller independently developed by Zhenhua Heavy Industry successfully hoisted the installation pit at Zhenhua Nantong Transmission Co., and safely flipped under the cooperation of 300 tons of car cranes and 150 tons of vehicles, leaving the assembly area. It indicates that the product has the conditions for factory installation and boarding.