描图仪器tracing: n. 追踪,追溯,追查;描摹,映写,复写;摹图;映写图, ...instrument: n. 1.仪表,仪器 〔cf. tool, implem ...signal tracing instrument: 信号故障探测仪; 信号寻纵器signal-tracing instrument: 信号跟踪仪器instrument steam tracing hook-up: 仪表蒸汽伴热管连接图下载手机词典可随时随地查词查翻译