(b) 1 part by weight of vegetal carbon dust |
a7c0 | |
1 part by weight of vegetal carbon dust |
a5c0 | |
1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm, | a0c0 |
(b) 1 part by weight of vegetal carbon dust |
a7c0 | |
1 part by weight of vegetal carbon dust |
a5c0 | |
1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm, | a0c0 |