packer cup
... downward-looking cup-type packer 开口朝下的皮碗封隔器 packer cup 封隔器皮碗 rubber packer cup 封隔器橡胶皮碗 ...
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封隔器橡胶皮碗 rubber packer cup
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针对自封式皮碗封隔器存在下井阻力大、皮碗易损坏和密封效果差等缺点，研制了HNX344—114型皮碗封隔器。
Model HNX344—114 cup packer is developed in the light of frequent failure and bad sealing effect of self sealed cup packers.
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