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opera glasses

Opera glasses - Wikipedia, the free encyclopedia

en.wikipedia.org - Opera glasses, also known as theater binoculars or Galilean binoculars, are compact, low-power optical magnification devices, usually used at performance ...

cooperate	cooperating	cooperation
cooperative	eyeglasses	glasses
inoperable	interoperability	intraoperative
lever-operated	maloperation	manual operation
manually operated valve	mean operating time between failures	mechanical operating valve
motor operated valve	multiple operator welding machine	night glasses
on-line operation	opera	operability
operability index	operable	operand
operant	operate	operated
operatic	operating	operating characteristic
operating condition	operating current voltage	operating frequency
operating load	operating mode	operating oil
operating oil pump	operating range	operating repair
operating rod	operating system	operating valve
operation	operation manaul	operation research

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