Third, the PTFE ( F 4 ) of the corrosion seal ring.

第三, 聚四氟乙烯 ( F4 ) 密封环的腐蚀.

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Press F 4 to select alternative start - up and installation modes.

按F4选择其他启动和安装模式.

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Hey Ian, are you going to the F 4 concert?

嘿,伊恩, 你要去看F4的演唱会 吗 ?

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If you see a different f 4 the past and it has been the best.

如果能让大家看到和以往不同的f4那就最好了.

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All I can say is, CEO, you are not F 4, You are Superman!

我只能说, 社长, 你不是F4, 你是超人!

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However, the F 4 singing together is receiving a large amount of negative reaction.

然而, 对于F4在一起唱歌也有不少负面反映.

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F 4 filler such as glass fiber, graphite , metal powder to increase its temperature, and wear resistance.

F4填充如玻璃纤维 、 石墨粉 、 金属粉等以提高其耐温性 、 耐磨性.

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To display all possible entries, in the Purchasing group field, choose the F 4 input help.

显示所有可能的条目, 在采购组栏位, 选定F4帮助.

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