free harbour=free port  自由港

trade-wind zone [= zone of trade wind]  信风带; 信风区

a method of free vibration  自由振动法

a stream of free flow  自由流股

ability of free radical scavenging  自由基清除能力

acceleration of free fall  自由落体加速度

acceleration of free falling body  自由落体加速度

accounting of free services  无偿服务核算

Act Governing Establishment and Management of Free Ports  自由贸易港区设置管理条例

admission of goods free of duty  准许免税输入商品

aluminium-lined cot free of treatment  铝衬套免处理胶辊

amplitude of free oscillations  自由振荡振幅

Amplitude of oscillation of free ends  自由端振幅响应

Analysis of free radical  自由基检测

Approximate equation of free energy  自由能近似方程

bearing bush free of lubrication  免加油轴承套筒

behaviour of free vibration  自振特性

Berthing at Free of Charge  免费靠泊于。。。。。。

carbide-free zone  贫碳化物区