obstructor

1. Repair of half maxillary bone defect applying magnetic attachment and non-root obstructor
   应用磁性附着体及无顶式阻塞器修复半侧上颌骨缺损
2. For the same line with obstructor at the user's terminal the attenuation of carrier signal is weak, when transferring distance is 30km, the applicable frequency range is 0.1~ 200kHz.
   当用户处有阻波器时，载波信号衰减很小，在30km范围内可用频段为0.1～200kHz。

noun

1. any structure that makes progress difficult

   Synonym:    obstructionobstructerimpedimentimpedimenta

2. someone who systematically obstructs some action that others want to take

   Synonym:    obstructionistobstructerresisterthwarter