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цепной полиспаст stresses
auto.	chain pulley block
construct.	chain tackle; chain-pulley block; chain-and-tackle block
heavy.eq.	chain hoist
mech.eng.	falls-and-tackle
mech.eng., obs.	chain tackle block; chain blocks
tech.	chain fall; chain block

цепной полиспаст: 2 phrases in 2 subjects

Mathematics	1
Military	1