4 f-systemf系统
strongly prime radical's f-system强素根sf
f-t optical system付立叶变换ft光学系统
UHF F mini-trunking radio system超高频小型中继无线通信系统
dual f-p interferometer system双f
4-f systemf转像系统
System F - Cry下一首
f-p strain sensing system法珀应变传感器
on-off f system断续控制系统