The other circles, represent water, fire, wind, space, and consciousness extend beyond the wall of the palace.
其它圆，表现水，火，风，空间和意识扩充超越宫殿的墙。
It is difficult to avoid the aging of phosphate ester fire-resistant oil in service. By-pass regeneration maintenance is the key step to extend oil life and safe operation.
磷酸酯抗燃油运行中难免老化、劣化，正确的旁路再生维护是延长油的使用寿命，保证油正常运行的关键。
It is difficult to avoid the aging of phosphate ester fire-resistant oil in service. By-pass regeneration maintenance is the key step to extend oil life and safe operation.
磷酸酯抗燃油运行中难免老化、劣化，正确的旁路再生维护是延长油的使用寿命，保证油正常运行的关键。
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