primary filter
初级过滤器
初级滤清器
初滤器
一次滤网
主滤器
粗滤器
初级过滤
fuel filter
燃料过滤器
燃油滤清器
燃油滤器
集滤器
滤清器
滤油器
油滤
active power filter filter
net primary production per gross primary production ratio
primary element and primary weight analysis
primary parametric resonance and primary resonance
AFR fuel storage (away-from-reactor fuel storage)
array of fuel rods in the fuel assembly
revoling leaf type filter + vacuum filter
de (得) as auxiliary verb
500 kV auxiliary transformer
6 kV auxiliary power system
abrasion-proof auxiliary nozzle
AC auxiliary driving system