gcd怎么读

This paper introduces the general arrangement, main technical parameters, diesel engine, transmission system, car body, braking system and running gear of GCD-470 heavy rail motor car. The type test, trial running, etc., are discussed.

介绍了新型电传动重型轨道车的总体布置、主要技术参数、动力装置、传动系统、车体、制动系统、走行部、型式试验及考核运行等。

The main result of this part is to show that when m 2 and n 9, the LCM power matrices [ S] on a gcd-closed set is invertible.

在这一部分中，我们证明了当m≥2且n≤9时，最大公因子封闭集合S上的最小公倍数幂矩阵[S~m]是可逆的。

Objective: To find out frequency change parameters of four phonation methods ( minimum, natural, maximum and falsetto maximum voices) and different maximum phonation persistent time ( MPPT) of them in patients with glottis closure disturbance ( GCD).

目的：了解声门闭合不良4种发声方式（最低音、舒适音、真声最高音和假声最高音）和不同发音持续最大时间（最大声时）的频率变化参数。