id	keyword
fens-843	 
fens-843	 
fens-843	food
fens-843	packaging
fens-843	systems
fens-843	film
fens-843	roll
fens-843	shevchenko
fens-843	volume
fens-843	issue
fens-843	mass
fens-843	safety
fens-843	environment
fens-843	materials
fens-843	lines