The problems existing in the braking effort design of disc braking equipment on passenger cars and the harm of them are analyzed.

介绍了提速客车盘形制动轮对轮座镶入部超声波探伤工艺，分析了探伤过程中存在的实际问题，并提出了相应的改进措施与建议。

youdao

"Mastered in 4K" Blu-ray Discs can be played on all existing Blu-ray Disc players.

ENGADGET: Sony to launch 4K digital distribution network this summer, 'mastered in 4K' Blu-ray discs

Some existing CD-RW drives require that the whole CD-RW disc be erased before new data can be written to it.

CNN: Verbatim to ship first 4X CD-RW drive

However, because the new media specifications are extensions of current Blu-ray Disc technology, future BDXL and IH-BD devices can be designed to support existing 25GB and 50GB Blu-ray Discs.

ENGADGET: Blu-ray Discs expand to 128GB under new BDXL spec