Polycrystalline tungsten is the exclusively hard and brittle material (under some conditions, when it is uncombined), which makes it difficult to work.
Polycrystalline tungsten bụ intrinsically kenkuwa na ike ihe onwunwe (n'okpuru ọkọlọtọ ọnọdụ, mgbe uncombined), na-eme ka o sie ike na-arụ ọrụ.