久久夜色精品国产欧美乱极品,入室强伦轩人妻电影,亚洲精品久久久久久中文传媒,又黄又爽又无遮体的A片,影音先锋av男人资源
| Material Type | Lead |
| Symbol | Pb |
| Atomic Weight | 207.2 |
| Atomic Number | 82 |
| Purity | 3N5-5N |
| Color/Appearance | Bluish White, Metallic |
| Thermal Conductivity | 35 W/m.K |
| Melting Point (°C) | 328 |
| Coefficient of Thermal Expansion | 28.9 x 10-6/K |
| Theoretical Density (g/cc) | 11.3 |
| Z Ratio | 1.13 |
| E-Beam | Excellent |
Vacuum evaporation means the evaporation materials are evaporated to atoms or molecules in vacuum by current heating, electron beam heating and laser heating. Atoms or molecules make rectilinear motion to impact substrate surface and condense to form films.
NEXTECK (NEXTECK m.inquietto.com) provides various high quality evaporation materials, with a full range of purities and sizes, to meet customers’ needs. Our precious and non-precious films are widely used in automotive, aerospace, physic, flat panel display, magnetic/light recording medium, coated glass, optical coating , hard film, decorative film and other fields.
