primary instrument 一次仪表 ; 主要仪器 ; 一次测量仪表
Primary instrument D 一次仪表
a primary instrument 一次仪表
primary measuring instrument 一次测量仪表 ; 一次仪表
primary measuring instrument room 一次仪表室
rated instrument limit primary current 仪表的额定极限一次电流
primary standard instrument 一次标准仪器
The astrolabe had long been the primary instrument for navigation, having been introduced in the eleventh century.
自11世纪星盘被引入以来，它一直都是航海的重要工具。
Gray's early music was in a contemporary folk-rock, singer-songwriter mode; his primary instrument was acoustic guitar, with occasional piano.
Gray早期的音乐类型属于当代摇滚民谣并且是一个唱作人。他早期使用的乐器是原声吉他，偶尔使用钢琴。
Keratometry - a keratometer is the primary instrument used to measure the curvature of the cornea.
角膜曲率检测——角膜曲率计是用来检测角膜曲率的仪器。
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