equal-arm balancesymmetrical bean balance等: class; grade; rank臂: arm天平: balance; auncel; scales杠杆式等臂天平: lever-equal beam balance横杆式不等臂天平: lever unequalbeam balance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:等臂天平,即可在微信中查询翻译