Please tell me which section of the book is based. And then in the specific description of the horizontal spacing, vertical spacing and step how to distinguish, a bit confused. More
Oxygen index greater than or equal to 30 for the B1-level extruded board extruded board: polystyrene foam is divided into expansive EPS and continuous extrusion XPS two, compared with EPS sheet, XPS board is the third generation of hard hair Foam insulation material, from the process it to overcome the EPS board of the complex production process, with EPS board can not replace the superior performance. It is made of polystyrene resin and other additives through the extrusion process has a continuous uniform surface and closed-cell honeycomb structure of the plate.
The essential requirement of the heat flow meter is that the heat flow through the heat flow meter is through the heat flow of the object to be measured, and the heat flow is parallel to the temperature gradient direction, that is, the heat flow through the heat flow meter is one-dimensional conduction, regardless of the diffusion to the surrounding
The sound of water pipes will not produce infrasound damage to the human body?
