an instrument used for testing the accuracy of a spirit level, consisting of a stand equipped with an adjustable mount which is used to incline the…
| 单词 | θ212504 | 
| 释义 | society > occupation and work > equipment > equipment for marking out work > 			[noun]		 > level > instrument for testing (1)		 bubble trier1799 an instrument used for testing the accuracy of a spirit level, consisting of a stand equipped with an adjustable mount which is used to incline the… | 
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