The masks are sold from SPFX masks, based in Van Nuys, California.
加州范纽斯的SPFX面具公司出售此种面具。
Conclusion SPFX is very effective and safe in the treatment of RTBI in the senile patients.
结论司帕沙星治疗老年患者呼吸道细菌感染疗效肯定、安全。
The main character in the film "Hallows Point" wore an SPFX mask, he said, as do the dancing old man characters who perform at Six Flags amusement parks.
电影"Hallows Point"的主角就戴着一副SPFX面具，还有在Six Flags娱乐公园表演的跳舞老人。
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