Silicone impregnations are divided into three groups depending on the size of their particles. Please list these groups and indicate their advantages:
Wśród impregnatów silikonowych wyróżnia się …

Important properties of wood preservatives, e.g.. range of protective action, in technical descriptions, etc. are given in the form of symbols. Please provide symbols for wood protection products and …

What requirements must security tapes meet??
Security tapes have to meet many requirements:
1) they must be stretchable and also suitable for wrapping curved surfaces;
2) …

Abrasive blasting materials

What materials are allowed to be used on the construction site for abrasive blasting of steel structures?
All abrasive blasting materials are allowed except quartz sand.
In practice …