1. Sampling time Collected after the crop is harvested or before sowing and fertilizing, generally after the autumn. Facilities vegetables are collected during the hanging period. The orchards are collected before the first fertilization after fruit picking, and saplings and unfruiting orchards should be collected before the expansion of the hole in the clear garden. When nitrogen fertilization is recommended, it should be collected before topdressing or during the critical period of crop growth.
2. Sampling period The same sampling unit, inorganic nitrogen and rapid diagnosis of plant nitrogen nutrition collected once every quarter or every year; soil available phosphorus, available potassium and other generally 2 to 3 years collected once; medium and trace elements generally 3 to 5 years collection 1 time.
Hydraulic Support System Seals Kits
Hydraulic Support System Seals Kits
The hydraulic support system used in mines is used to support equipment during the mining process of coal mines or other underground mines.
It mainly consists of hydraulic supports, hydraulic stations, control systems, and sensors.
Hydraulic support is the core component of the hydraulic support system used in mines, which uses hydraulic cylinders as the support force source,
Capable of supporting huge rock weights in underground mines. The hydraulic station provides a hydraulic oil source,
Hydraulic oil is transported to the hydraulic support through pipelines to achieve support function.
The control system is an important component of the hydraulic support system used in mines, which controls and monitors the hydraulic support through sensors and controllers. Sensors can monitor the status of the bracket in real-time, including support force
The controller controls the hydraulic support based on the feedback data from sensors, such as inclination and displacement, to ensure its stability and safety in the mine.
The hydraulic support system used in mines has advantages such as high support force, good stability, and safety and reliability,
Widely used in underground mining industries such as coal mines, metal mines, and non-metallic mines. With the continuous progress of technology and the continuous expansion of applications, hydraulic support systems for mines will continue to play an important role,
Provide strong support for the safe and efficient development of the underground mining industry.
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