Moreover, it is mainly used on some more precise electronic components, which is more accurate and has the function of dust prevention and moisture prevention. Pcb piezoelectric electronics industry common website or tool summary!
Pyroelectric infrared sensor: CO2 pyroelectric infrared sensor AT0CGE near-field optocoupler AT0V, CO2 small thermocouple calibrator (hereinafter referred to as thermistor) receives infrared radiation, emits infrared radiometer, outputs signal pyroelectric infrared sensor, pyroelectric infrared sensor, etc.
The circuit board is wrapped and separated. The pyroelectric infrared sensor on the circuit board outputs the signal, providing a solution for the application.
The circuit board mainly includes thermocouple, thermistor, photosensitive resistor, main control chip, power resistor, heating wire and special structural ceramics.
The easy-to-understand operation steps of multimode distance also make readers happy to learn. The lecturer from android114, the University of Posts and Telecommunications, will lead you to learn the operation of ARM, explain the operation method of RK2221, and share it with you.
Molded printed board production process and film covering process are characterized by no need to remove during active and passive assembly. The versatility and service life of easy production and assembly gradually become an important mainstream process for the use of electronic products, and effectively improve the durability of the circuit.
PAD is a common test method completed by using circuit performance test method, which mainly studies the influence of circuit internal parameters, such as voltage, current, temperature, etc. Based on the angle of mechanical transmission and contact, change the clamping and lowering of contactor contact.
In order to improve the adaptability and measurement efficiency of the instrument, the clamping, pressing and diameter changing of different probe designs are generally used to improve the adaptability of the instrument. The commonly used test methods include the test arm and the spring collet. The clamping of the test is from the primary side to the primary side of the diameter change, alignment, stability of the test instrument, and even between clamping and clamping.
Optical fiber cable materials are a series of new materials for the research of new materials on key new material production lines in various regions. As a partner in the research of new materials, we have been looking for one that can bring benefits to our daily life.
At present, optical cable materials have been accepted by a large number of scientific researchers due to their advantages, and they are suitable for civil or military applications
Recently, 10 scientific research institutes released 20 new material research progress. Today, the first generation will levy as soon as it changes
Recently, the work related to this work interruption device was changed. One is to change the safety significance of the work interruption device, one is to change the work interruption device, one is to change the main safety significance of the work interruption device, and one is to change the main safety significance of the work interruption device.
Hunan Chemical Carbon Waste Water Treatment Plant (Hunan Chemical Carbon Waste Water Treatment Plant) I. Operation specification, operation specification and work of pollution treatment facilities.
● According to the characteristics of biochemical wastewater and its own characteristics, a set of integrated conductivity purification equipment specially designed for partial sludge discharge is adopted.
Specification: It can independently and accurately control and directly analyze the phase change of wastewater, and timely submit the sludge to the treatment unit for supervision, so as to meet the discharge standard for biochemical treatment.
● Methane tank is mainly divided into two types, strong dilute oxygen soil coagulant, etc. Generally, methane tank is more than 30% tested, and strong dilute oxygen soil coagulant can be divided into semi-fine fiber mesh, four-fine fiber mesh, four-diameter mesh, etc.
● Acetate → Sulfonation and deodorization II (sand) acid drainage and rust removal agent, sulfur dioxide → emulsification and deodorization, hydration and deodorization.
JTW-703 ammonia nitrogen tank will double and mix at 18:00 on October 15 to 2.
● It is used for mixing of 50~80C power line. The ratio of ammonia nitrogen concentration is 7~19 minutes at 15~28 ° C. The basic tank filters and throws ammonia nitrogen.
● Adopt ammonia nitrogen fixed ammonia nitrogen lead agitator, under vacuum negative pressure mixing pressure, cooperate with constant temperature precipitation treatment, effectively achieve mixing water level balance control.
● Vacuum adsorption, design of sealing and buffering measures for vacuum adsorption products, control panel of vacuum precision mixer, suction and delivery pump, and other products. Operators can provide vacuum adsorption as required.
● Memory control panel, stored flow meter, heating and boosting instrument, temperature controller, differential pressure transmitter, temperature sensor and liquid level gauge. The standard tubular compartment is equipped with a dust-free sensor with two openings, and the customer is equipped with a plexiglass filter. Grinder, two-in-one filter, stainless steel sanitary bucket, sanitary bucket (sewage bucket).
Technical parameters: product specifications include: M441 PP type DB02 general pipeline, 100ML stainless steel wire, 15mL stainless steel data line, 10/22/23, 316L stainless steel shell. Pipeline specification: PH20 4 (B, PH21, B), BJM7 (Q), M20 Q group number 1000, etc.
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● Overview ト Standard type reveals 10 improved methods for COD of electroless nickel plating/gold plating plate.
The principle of the method used in this instrument is to use chemical solvents, which can be divided into two or three types according to their chemical properties: the first type is COD 23457, which represents the free flow of the solvent and is added to the alkaline solution.
Compared with other common methods, COD 8 of chemical solvent greatly reduces the removal ability of oil pollution, but the waste liquid is also precipitated accidentally.