Untuk material filter diambil dari PG-1, PG-2, dan PG-3, persyaratan dasar seperti specific gravity yang besar, non kohesi dan partikel lolos ayakan No. 200 tidak lebih dari 5 %.
To filter material taken from PG-1, PG-2, and PG-3, basic requirements such asspecific gravity is great, non cohesion and particle escapes no. 200 sieve are notmore than 5%.
For the filter material taken from PG-1, PG-2 and PG-3, the basic requirements such as specific gravity is large, non cohesion and the particles passes a sieve No. 200 is not more than 5%.