It has two form sealing type: soft and hard seal.
密封形式有软密封和硬密封两种。
The sealing structure can be divided into soft-seal and hard seal structure.
其密封结构可以分软密封、硬密封结构。
Generally use the soft rubber type sealing ring seal, hard seal ring-type metal seal used.
软密封型一般采用橡胶环密封，硬密封型通常采用金属环密封。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
Seal the surface material: Structure pottery or exceeding two kinds alloy materials of hard surface.
密封面材料：结构陶瓷或超硬表面合金材料二种。
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