... carbon film resistor 炭膜电阻 carbon gland 碳精密封装置 carbon manganese steel 碳锰钢 ...
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combined labyrint and carbon gland 迷宫与碳精混合密封
combined labyrinth and carbon gland 组合式密封
carbon ring gland 碳精密封环压盖 ; 炭精气封圈
carbon-packed gland 碳精填密函盖
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