optical projection pantograph光学投影: optical projection缩放仪: pantograph光学投缩放仪: optical projection pantograph光学缩放仪: optical pantograph光学投影: optical projection◇光学投影比较仪 optical projection comparator; projection comparator; 光学投影仪 optical projector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:光学投影缩放仪，即可在微信中查询翻译
