基き準じゅん線せん

noun

reference line; baseline; datum line

Technical term used in drafting, surveying, engineering, and design to indicate a line from which measurements are taken or comparisons are made.

• 設せっ計けい図ずでは、基き準じゅん線せんを引ひいてから各かく部ぶの寸すん法ぽうを記き入にゅうする。

  On the blueprint, you draw a reference line and then mark the dimensions of each part.

• 測そく量りょうの際さい、基き準じゅん線せんからの距きょ離り