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ключ-замок stresses
biotechn.	knob into holes (rebecapologini)
ключ замка
auto.	key lock
construct.	lock key

ключ-замок: 146 phrases in 24 subjects

Automated equipment	1
Automobiles	11
Biochemistry	1
Biology	2
Chemistry	1
Computers	1
Construction	7
Electrical engineering	1
General	44
Immunology	3
Informal	2
Information security and data protection	11
Makarov	31
Mechanic engineering	2
Medical	2
Oil / petroleum	3
Oil and gas	1
Oil and gas technology	1
Polymers	1
Rail transport	3
Security systems	11
Technology	3
Uncommon / rare	1
Wrestling	2