obstructor

obstructor

noun

any structure that makes progress difficult: Synonym: obstruction obstructer impediment impedimenta

someone who systematically obstructs some action that others want to take: Synonym: obstructionist obstructer resister thwarter

数据来源：WordNet

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。