备用过滤器 | |
el. | reserve filter; back-up filter |
装置 | |
gen. | installation |
hydroel.st. | setting; appliance |
met. | arranger; assembly |
rem.sens. | accommodation |
sport. | facility |
| |||
reserve filter; back-up filter |
备用过滤器 : 4 phrases in 3 subjects |
Aviation | 1 |
Electronics | 2 |
Technology | 1 |