Harm and impact of sand and dust environment on military equipment
Natural sand and dust environments are usually associated with dry and hot areas, but they are also found seasonally in most other areas, so sandstorms generated in nature are an important factor to consider when using military equipment. However, as the mechanization of military operations increases, they cause more problems than the natural sand and dust environment. To help determine the GJB 150.12A-2009 Military Equipment Laboratory Environmental Test Method Part 12: Whether the sand and dust test is applicable to the equipment to be tested, at least the following typical effects should be considered:
1. Surface wear and abrasion;
2. Seal penetration;
3. Circuit performance degradation;
4. The opening and the filtering device are blocked;
5. The physical impact of the matching components;
6. The moving parts are stuck and obstructed;
7. Reduced thermal conductivity;
8. Optical properties are affected;
9. Overheating and fire hazard due to obstruction of ventilation or cooling.
This female urogenital system model shows kidney, ureters, urinary bladder, uterus, accessories of uterus, vagina, ovary membrane, ligaments, uterus ligament and its artery etc. Demonstrate the external features of the urogenital system and the internal structures of the kidney, urinary bladder, penis and testicle.Made of PVC plastic.
Genitourinary Model,Urinary System Model,Human Genitourinary Model,Genitourinary System Model
Xinxiang Vic Science&Education Co.,Ltd. , https://www.hnhumananatomymodel.com