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| sine centre (разновидность синусной линейки. – "A sine centre is basically a sine bar with block holding centres which can be adjusted and rigidly clamped in any position. " смотри также sine bar CopperKettle) | |||
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| sine centre (разновидность синусной линейки. – "A sine centre is basically a sine bar with block holding centres which can be adjusted and rigidly clamped in any position. " смотри также sine bar CopperKettle) | |||