Under the higher confining pressure, the shearing strength and the differential stress between the compression strength and confining pressure tend to be the constant.
至更高围压后，抗压强度与围压的应力差、抗剪强度将趋于某一常数。
V-packings: Self-adjusting, spring-loaded, double V-packings maintain constant high pressure seal compression and extend seal and plunger life.
密封：自动调节，弹簧底座，双层V-密封维持高压密封和延长密封与柱塞寿命。
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