clinometreelevation orientaion quadrantquaddrantquadrant i trumentquadrant instrumentrange quadrantsector象限: quadrant仪: appearance; bearing地平象限仪: azimuth quadrant光学象限仪: optical quadrant; optical quarter meter火炮象限仪: gunner's quadrant下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:象限仪,即可在微信中查询翻译