inclination of the seat surface [车辆] 座面倾角
valve seat surface 活门支承面
depth of the seat surface [车辆] 座面纵深
contact surface of valve seat 阀座接触面
sealing surface of seat 阀座密封面
seat contact surface 座的接触表面
Seat and backrest surface 座位和靠背表面
Medium pressure increases toward the valve seat surface and oblique cone sealing surface squeeze is tightening, sealing the better.
正向介质压力增大时阀板斜圆锥表面与阀座密封面挤压越紧，密封效果越好。
Medium pressure increases toward the valve seat surface and oblique cone sealing surface squeezed more tightly, sealing the better.
正向介质压力增大时阀板斜圆锥表面与阀座密封面挤压越紧，密封效果越好。
Testing include seat right side and back side strength testing, seat surface strength testing and seat surface activity endurance testing.
各项测试包括椅背正反面强度测试、椅背动作耐久测试、座面强度测试及座面动作耐久测试等。
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