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Measuring aid for metre rules has sprung cursor and is clamped on
Measuring aid for metre rules has sprung cursor and is clamped on
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机译:仪表规则的量具已弹起光标并固定在
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摘要
A measuring aid for jointed metre rules is clamped to the rule and has scales with grooves for a removable U section sliding cursor (9) marked with an arrow and held by a spring and burl.
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