trapping class mark [计] 俘获类标志
ship class mark 船级标志
station class mark 电台等级标记 ; 移动台等级标志
mobile station class mark 移动台类型标记
Service Class Mark 业务类型标志 ; 签约业务类型标志
Mid-Class Mark 组中值
Class Mark Request 级别请求
E-Class Mark III 桌面型
DATAMAX E-Class Mark III 条码打印机
N a value within a class interval, esp its midpoint or the nearest integral value, used to represent the interval for computational convenience 组值 [statistics]
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