The generic name of VTM Virus Sampling Tube is a single-use virus sampling tube, which is generally used for the detection and sampling of infectious pathogenic microorganisms in disease control departments and clinical departments. It is suitable for detection and sampling of influenza viruses (including general influenza, highly pathogenic viruses, H1N1 influenza virus, etc.), hand, foot and mouth virus, new coronavirus, measles and rubella and other types of viruses. VTM virus sampling tube can also be used for detection and sampling of Mycoplasma, Chlamydia and Ureaplasma urealyticum. Biomed Vtm Kit,Vtm Test Kit,Saliva Collection Tube,Virus Sample Collection Tube Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com
The virus and related samples in the VTM virus sampling tube should be stored and transported within 48 hours in a refrigerated state (2-8°C). Viruses and related samples can be stored for a long time in -80℃ environment or liquid nitrogen environment. The virus can maintain the activity of the virus in a lower temperature range, reduce the speed of virus decomposition, and improve the positive rate of virus isolation.
The VTM virus sampling tube is generally equipped with a disposable flocking swab. From the appearance point of view, the flocking swab is white and soft. Using this soft brush during the sampling process will make the user feel no foreign body, and it is suitable for different Partial sampling person. Moreover, the flocking swab is designed with a breaking point that conforms to the length of the sampling tube and the natural orifice of the human body, which is not only convenient for sampling but also convenient for transportation of the specimen.
Repair method of diesel engine body damage
The diesel engine block is typically made from gray cast iron and serves as the foundational structure that supports various internal and external forces during operation. Over time, it can suffer different types of damage, especially under harsh conditions. Here are the most common forms of damage and their repair methods:
1. Cracking: This is one of the most frequent issues, particularly in cold weather. If a crack occurs, it must be repaired using cold welding techniques to avoid further stress on the area. The process involves drilling holes at both ends of the crack, inserting several pins along the crack line, and placing small steel plates perpendicular to the crack. A low-carbon steel electrode is then used to weld along the crack, ensuring proper edge coverage. After welding, gently tap the area with a small hammer to relieve stress, and use a flame to correct any warping.
2. Wear on the upper and lower balance shaft end 205 bearing hole: This issue needs immediate attention. For light wear, you can use a method where the outer ring of the bearing is slightly adjusted by spot welding, then filed and pressed into place. Another option is to use a 2 mm thick iron plate with a 50 mm inner hole as a washer, drilled with three holes to secure it with flat head screws. In cases of severe wear, the original hole may need to be enlarged, and a new bushing inserted with additional holes for secure fastening via screws.
3. Cylinder head bolt hole stripping or breaking: This usually happens due to excessive force or improper tightening. If only one thread is damaged, it can be re-tapped and a new cylinder head bolt can be machined to fit. However, if the hole is completely broken or severely stripped, it cannot be repaired and must be replaced.
4. Surface pitting or corrosion: To address this, start by using a steel cone to expand the affected area, then fill it with aluminum wire or perform spot welding to restore the surface integrity.
Regular maintenance and careful handling during installation can help prevent many of these issues. Always follow proper procedures and consult a professional when necessary to ensure the longevity and performance of the engine.