1. Soil. To grow radishes, you must choose a plot with deep soil and good drainage. If there are hard objects such as rocks in the soil, it will hinder the growth of radish roots, which will cause the lateral roots of radish to expand and bend and cause radish to split. 2. Moisture. Radish needs sufficient water during the growth process, but it should not be too much. If there is a lot of water for two days, it will cause poor soil aeration, inhibit the hypertrophy of the main root of radish, and form many lateral roots, so drainage work must be done well. 3. Fertilize. Fertilization of radish, especially farmyard manure, must be thoroughly decomposed, and spray Diguozhuang Ti Ling on the leaves to increase nutrient flow, promote fruit development and expansion, without stimulating cells, non-toxic, instead of pesticide expansion agents and hormone expansion, and enhance radish Absorb water and fertilizer, reduce the occurrence of radish deformities, and improve fruit yield and quality. 4. Temperature. Before sowing radishes, you must pay attention to the shed and mulch to keep the appropriate temperature. Spraying new high-fat film on the leaf surface of the field seedlings in the dry season can protect the moisture of the seedlings and improve the vitality of the plant's drought-resistant factors and the ability to resist drought. 5. Pests. Underground pests can gnaw on radishes and inhibit the growth of the main roots, causing the lateral roots to swell, bifurcation or deformity. During the growth period of radishes, the use of Root Shitong and pesticides to irrigate the roots can promote the effective ingredients of pesticides to kill the root pests of fruit trees. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
The piston is one of the main moving parts of the
engine, is composed of combustion chamber components. Engine Piston Parts,Engine Parts ,Car Engine Parts,Parts Of Engine,Piston Engine Parts ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com
The pressure of the gas
piston through the connecting rod to the crankshaft, realize the change from
heat energy to mechanical energy.
The work condition is very bad, and the
temperature of 1400-1800 DEG C, and pressure
Up to 13MPa above the gas
contact, greatly alternating thermal stress and mechanical stress.
And by the
serious corrosion of gas, and under the condition of boundary lubrication and
cylinder wall friction and strong impact 1 times.
The piston in high
temperature, high pressure, strong corrosive gas contact so that it has enough
strength and hardness,
Heat resistance and good thermal resistance, high
fatigue strength and corrosion resistance. For high speed diesel Engine Piston
also requires light as far as possible.
In order to reduce the inertia
force.
Marine piston large low speed diesel engine of the crosshead is
usually combined.
The heat treatment process by normalizing and annealing,
and iron pearlite are ferrite organization, has good heat resistance.
Piston
alloy quenched and tempered steel has better heat resistance and corrosion
resistance. The skirt with nodular cast iron annealing treatment, with good wear
resistance.