In the middle and mid-December of mid-December, most of the province's provinces continued to cool down, accompanied by snow and ice, but the low temperature and duration were not enough to cause damage to rapeseed and wheat growth. Only some vegetables were frozen, and the rain and snow were alleviated. The drought in the early stage of some areas is beneficial to the wintering and cold-resistant exercise of oil wheat. Linyi Fertilizer Network Copyright
Hubei Meteorological Observatory is expected to be expected in the middle and early period of late December, affected by high altitude low trough and strong cold air on the ground. There is a precipitation weather process in Hubei Province accompanied by strong winds. At the end of the year, there is cold air in the north and there will be Gale and cool weather occurred. Most of the rainy season is close to normal year, 5-10 mm in the north and 10-20 mm in the south; the average temperature is close to normal in the same period of the year, 4-6 °C in most areas; the extreme minimum temperature in the north is -5 to -3 °C in the north, and the south is -3~ -1 ° C. According to the later weather trends and crop development process, the following agricultural recommendations are made: Linyi Fertilizer Network Co., Ltd.
1. Frequent cold air in the ten days, greenhouse vegetables should pay attention to measures to prevent freezing and warmth, and at the same time pay attention to ventilation and ventilation; mountain, semi-alpine citrus, tea should strengthen winter tube, timely take smoke, cover straw, topdressing and other measures to prevent Freezing damage; livestock and poultry houses are intensified and refurbished, pay attention to heat preservation and antifreeze, so as to facilitate the safe wintering of livestock and poultry. Linyi Fertilizer Network Copyright
2. Strengthen the field management of wheat and rapeseed after snow, timely clean up the three ditch, hoeing soil, weeding and topdressing, warming and protecting the sputum, and promoting the growth and protection. Linyi Fertilizer Network Copyright
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Piston& Piston Ring
Piston rings are manufactured and classified on the basis of function and usability. The primary usage of the Piston Ring is to seal the chamber (where the piston is moving), which can be a combustion chamber of a 2 stroke or a 4 stroke engine. Marine engines have three or more types of rings fitted on the circumference of the piston.
The piston ring is an essential piston part, and its numbers and functionality differ depending on the type and capacity of the engine.
In 2-stroke large engines, compression type piston rings are used to seal the combustion chamber and wiper rings are installed below them to wipe the deposits from the liner and distribute oil on the liner surface.
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