英文關鍵字
amphebol
analysis
anti
asbestos
asbestosis
association
ban
canada
chrysotile
close
composition
dangerous
disease
ecology
enclosing
export
fiber
fibers
flax
geology
group
harm
harmful
harmfulness
health
import
kazakhstan
large
lungs
macro
mineral
minral
mountain
orenburg
properties
protection
respiration
respiratory
rock
russia
stone
structure
study
system
texture
use
variety
video