Analysis of line-of-sight  视线分析

class of line  线类

east extension line of Line 2 of Shenzhen metro  深圳地铁2号线东延线

length of line of action  啮合线长度

straightness of line of sight  平直度; 瞄准线

Class Of Service  服务等级; 服务类别

Class of Service COS  业务等级; 业务类别

class of service tone  服务分类音

TCOS Trunk Class Of Service  服务的中继线等级

the default class of service  缺省服务级别

the failure class of service  失效服务级别

user class of service  用者服务类别; 用户服务级别; 用户服务分类

length of service of episode  发病工龄

Out of service of cell  停槽

3D realization of line sketch  AIC准则; 线图的三维实现

a cell line of Big-head  鳙鱼细胞系

a line of least resistance  电子探针; 最容易的途径

a production line of cement  水泥生产线

A3 male sterility line of sorghum  高粱雄不育系A3; 纳秒; 毫微秒