Description
			    	    	1 - minimum screwing depth / mm
2 - concrete
3 - solid bricks
4 - lime-sand brick
5 - gas concrete
6 - hollow block
7 - pumiced concrete
	2 - concrete
3 - solid bricks
4 - lime-sand brick
5 - gas concrete
6 - hollow block
7 - pumiced concrete
                                
 English
                        
 Italiano