ຂ່າວ EMIN

Is it dangerous to live near a BTS base station? Find out the assessments from the WHO, ICNIRP, Vietnamese regulations, and the actual electromagnetic radiation levels in residential areas.

What are the differences between sample homogenization and emulsification? Learn about the nature of each process, its operating principles, applications in food, cosmetics, pharmaceuticals, and how to choose the right equipment.

Flip through detailed drawings or standard bolt documentation, and the designation 6H/6g appears very frequently. The external thread is machined slightly smaller than the nominal size, while the internal thread maintains its correct tolerance range.

What are the differences between coarse and fine threads? Learn about their characteristics, load-bearing capacity, vibration resistance, practical applications, and how to choose the right type of thread in mechanical engineering, machine manufacturing, and industrial production.

How do metric and inch thread gauges differ? Learn how to distinguish M10×1.5 from 1/2"-13 UNC, thread pitch, thread crest angle, and how to choose the correct GO/NOGO gauge to avoid damaging parts.

Set up two multimeters at the same location and their displays may still differ by several volts or a few percentage points. The difference often comes from how each device processes the input signal before converting it into a displayed value.

When using a microscope, turning the focus knob is often considered the decisive step in image quality. If the image is not clear, increasing magnification, adjusting focus or increasing light is a very natural reaction. However, there are cases where images still lack detail and low contrast despite correct measurement operations.

A measured voltage of 220V does not necessarily mean the system is operating stably. When the multimeter display and actual equipment behavior begin to contradict each other, the inspection should be expanded to include load conditions, electrical contact quality, and waveform characteristics rather than repeatedly performing the same voltage measurement.

What is ASTM Type I, II, and III distilled water? Learn about the differences in purity, conductivity, resistivity, and applications of each grade of water used in laboratories, testing, research, and production.

What is the HRC hardness of heat-treated steel? Learn about the hardness of S45C, SCM440, and SKD11, how to evaluate HRC measurement rsults, and the reasons why steel may achieve incorrect hardness after heat treatment.