2 in notes

ckabu gismu

x₁ is a quantity of/contains/is made of rubber/latex from source x₂ of composition including x₃.

See also pruni.

• jbovlaste

In notes:

pruni

(adjective:) x₁ is elastic/springy.

rarckabu

c₁=r₁ is a quantitiy of/contains/is made of natural rubber from source c₂, of composition including c₃.