R12造句

Research on the Function of ERICSSON R12 Increase SDCCH Capacity

Research on Centering Construction Simulation Applied in Long-span Stone Arch Bridge with ALGOR R12

你带上一罐制冷剂，有门路的话就用R12，就是它造成臭氧层通洞之类，或者用R134a，从锁眼里喷进去，直到把里边的零件冻住。