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Packing element shoulder protection and large locking structure improves the properties of the packer.
封隔元件肩部保护结构和定位大锁块的采用，提高了封隔器的密封、坐封和解封性能。
youdao
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Packing element shoulder protection and large locking structure improves the properties of the packer.
封隔元件肩部保护结构和定位大锁块的采用，提高了封隔器的密封、坐封和解封性能。
youdao