The principle of the phase meter and it's block dia - gram are presented.

论述了相位计的工作原理，给出了系统框图。

Bob Wehle found the diamond at the Crater of Dia - monds State Park in Arkansas on Oct .14.

鲍勃·尔10月14日在阿肯色州的“钻石坑”州立公园发现了这颗钻石.

We have complete sets including heating element lift test, mould opening, dia-casting and deep processing.

从电热体寿命研究、模具开发、产品压铸至产品深加工，构成一系列配套生产。

Detailed studies are made both in terms of test and theory on the life of dia- mond saw blade which changes with sawing parameters.

从实验和理论上较深入地研究了金刚石圆锯片的寿命随锯切工艺参数变化而变化的规律，在此基础上，根据最低生产成本优化了锯切工艺参数。