十字形焊缝
cross-shaped welding seam
8字形磁极图
figure of eight polar diagram
8字形架空光缆
Figure-8 Aerial Fiber Optic Cable
8字形腔
figure-of-eight laser(F8L) cavity
Figure-of-Eight Cavity
Figure-of-eight laser cavity
8字形指向传声器
figure-of-eight microphone
8字形自承式电(光)缆
figure 8 self supporting calbes