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PT與ZG螺紋一樣嗎? |
點(diǎn)評(píng)
標(biāo)ZG都懂,標(biāo)Rc、Rp,R1,R2,好些人不明白。
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點(diǎn)評(píng)
G螺紋,加金屬組合墊或者銅墊。組合墊拆裝幾次就得更換了,銅墊抗造。
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