zero offsent optical square

Optimization of Facilities Location Based on Rectilinear Distance;

基于直角距离的设施选址优化问题

off-set die head

直角机头(压出机)

Influence of structural parameters of T die to the flow balance

直角机头流道结构参数对流动平衡的影响

sweep optical square

平面扫描仪;扫描式光学直角头;扫描直角转光器

the ratio of the focal length to the diameter of a (camera) lens system.

相机镜头直径焦距比。

to point the camera straight up.

将摄影机镜头朝上直立

An old man was fiddling away at the street corner.

有个老头一直在街角拉小提琴。

Straight thread elbow--Body

GB/T3738.2-1983卡套式端直角接头体

Flared type tube fittings--Union elbow--Body

GB/T5630.2-1985扩口式直角管接头体

Flared type tube fittings--Union elbow--Assembly

GB/T5630.1-1985扩口式直角管接头

Flared type tube fittings--Swivel elbow--Assembly

GB/T5632.1-1985扩口式组合直角管接头

Flared type tube fittings--Bulkhead union elbow--Assembly

GB/T5644.1-1985扩口式隔壁直角管接头

Flared type tube fittings--Swivel elbow--Body

GB/T5632.2-1985扩口式组合直角管接头体

Flared type tube fittings--Bulkhead union elbow--Body

GB/T5644.2-1985扩口式隔壁直角管接头体

Flared type tube fittings--Male elbow--Assembly

GB/T5629.1-1985扩口式锥螺纹直角管接头

Flared type tube fittings--Male elbow--Body

GB/T5629.2-1985扩口式锥螺纹直角管接头体

Union elbow--Body

GB/T3740.2-1983卡套式直角接头体

Straight thread elbow--Assembly

GB/T3738.1-1983卡套式端直角管接头

Union elbow--Assembly

GB/T3740.1-1983卡套式直角管接头