Raw leather HS code references

List of the catalogue of this article:

• 1,Raw leather HS code referencesWhat are the management systems
• 2, The magic of siphon drain pipe design, avoid water hazards all depends on it
• 3, How to adjust the pressure of the ground source heat pump underground pipe

What are the management systems

Press Common enterprise management systems are divided according to functions, including ERP (Enterprise Resource Planning System), CRM (Customer Relationship Management System), OA (Office Automation System), Production Management System, Purchase, Sale and Inventory Management System, Project Management System, etc.

Transaction Processing System (TPS): Operators and supervisors are used to input transactions, events, sort, list, merge updates, output detailed reports, lists and summaries, etc. Management Information System (MIS): Middle managers are used to input general transaction data and simple models to process routine reports.

Management software systems include Jindie erp system, Wave Cloud erp system, Youyou Cloud erp system, SAPS/4HANACloud, Oracleerp system, Zhibang International erp system and so on.

Nagios: It is an open source network monitoring system that can be used to monitor network equipment, servers and applications, etc. Zabbix: It is also an open source network monitoring system that can be used to monitor network devices, servers and applications.

The database management system includes Oracle, MySQL, SQL Server, PostgreSQL, SQLite, etc.

Management information system includes post and telecommunications information system, bank management information system, civil aviation information system, enterprise management information system, hospital management information system, such as: national economic information system, railway transportation management information system, power construction management information system, hotel management information system, learning School management information system.

The magic of siphon drainage pipe design, avoiding water hazards depends on it

1. Siphon drainage The main difference between the water pipe design, the siphon rainwater bucket design, the gravity drainage rainwater bucket and the siphon system rainwater bucket is that an air baffle is set in the rainwater bucket. The air baffle is stacked and has no through holes. The design of roof combination parts, waterproof layers and leaf covers all follow conventional ideas.

2. Siphon pumping can be carried out with a hose. Put the hose in the pool that needs to be drained and fill it with water. Hold down the opening of both ends of the hose with your hands, and leave one end of the hose in the pool. Do not let go of your hand.Put the other end in the lower part outside, and loosen the openings at both ends of the hose at the same time, and you can use the siphon principle to pump water.

3. The calculation of gravity drainage design is not calculated according to full flow, and the laying slope of the rainwater suspension pipe shall not be less than 0.005.

4. The principle of siphon drainage is to use the negative pressure generated when the liquid flows naturally in the pipe to make the liquid flow from low to high, and finally achieve discharge.

How to adjust the pressure of the buried pipe of the ground source heat pump

1. The high and low pressure of the ground source heat pump screw machine is adjusted like this: check the pressure of the system: first, it is necessary to check the pressure of the system to ensure that the pressure of the system is within the normal range. Adjust the high pressure: If the high pressure is too high, the high pressure can be reduced by adjusting the high pressure valve.

2. Adjust the speed of the pump: Change the flow and pressure of the pump by adjusting the speed of the pump. Generally speaking, increasing the speed of the pump can increase the flow and pressure of the pump, and reducing the speed of the pump can reduce the flow and pressure of the pump. Adjust the outlet valve of the pump: change the flow and pressure of the pump by adjusting the outlet valve of the pump.

3. By receiving the signal of the industrial automation control system (e.g.: 4~20mA) to drive the valve to change the cross-sectional area between the spool and the valve seat to control the flow, temperature, pressure and other process parameters of the pipeline medium. Realize the automatic adjustment function.

4. How to adjust the floor heating pressure? How to adjust the floor heating pressure: rotate counterclockwise, increase the water flow, rotate clockwise, and decrease the water flow. The word MAX is written on the knob, which represents the value.Both the inlet and the outlet rotate to the MAX position, and the temperature will be reached.

5. Test pressure: When the working pressure is less than or equal to 0MPa, it should be 5 times the working pressure and should not be less than 0.6MPa. When the working pressure is greater than 0MPa, 0 should be added to the working pressure. MPa. The first water pressure test should be done before the vertical buried pipe heat exchanger is inserted into the drilling.