Noise-reduction headphones block the screech of the drill and play a CD of your choice, and the specially constructed dental chair channels the sound waves from the music into a full-body massage.
隔音耳机使你听不到牙钻刺耳的噪音，倾听自己喜欢的音乐。特别定制的治疗椅将音乐的声波转换成全身按摩。
Testing out your drill bit on a scrap wood block or board before attempting to do so on your guitar is a very very wise idea.
你的一个废材块或板钻头试验，然后再尝试做您的吉他等，是一个非常非常明智的想法。
I was lucky to have a drill press and vee-block on hand, but they are not strictly necessary.
我很幸运，有一个钻床及牧畜手头块，但他们不是绝对必要的。
Molding ways of the drill bit comprise one-step forming and mosaic block type two-step forming.
钻头成型方式包括一次成型和镶块式二次成型。
Molding ways of the drill bit comprise one-step forming and mosaic block type two-step forming.
钻头成型方式包括一次成型和镶块式二次成型。
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