first permanent molar  不锈钢预成冠; 下颌第一磨牙; 恒牙第一大臼齿; 第一恒磨牙

First Permanent Molar Teeth  第一恒磨牙

Immature Permanent Molar  未成熟恒牙大臼齿

mandibular first permanent molar in pig  猪下颌第一恒磨牙

The first Permanent molar  第一恒磨牙

young permanent molar teeth  年轻恒磨牙

mandibular permanent first molar  下颌第一恒磨牙

Permanent first molar  第一恒磨牙

permanent mandibular second molar  下颌第二磨牙

Permanent three-rooted mandibular first molar  3根型下颌第一恒磨牙

2 type permanent magnet  2型永磁材料

2 type SmCo permanent magnets  2型SmCo永磁合金; 指向天线; 束射天线

2 type Sm-Co permanent magnets  2型Sm-Co永磁体; 2型Sm-Co永磁

2: 17 type SmCo permanent magnet  2型SmCo永磁材料

2: 17 type SmCo permanent magnets  2型SmCo永磁合金

2∶17 type SmCo permanent magnet  2∶17型SmCo永磁

A New Pulley-Type Permanent-magnet Generator  新型带轮式永磁发电机

a permanent infectious diseases hospital  永久的传染病医院

A Permanent-Magnet Synchromotor With Double-Poles  分极式永磁同步电机