The landing collar comprises housing, ball seat and latch.

由外壳、锁紧座和球座等组成。

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The sealing sections of non-return valve ball seat were separated, material was changed into zirconium oxide ceramic, 0.

通过分离单向阀球座密封段，材料改为氧化锆陶瓷，密封段流道直径增加0。

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The flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.

接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。

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Larsson latched onto a Sutton pass as Craig Short slipped and clipped the ball over Brad Friedel to put Celtic in the driving seat.

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"For example, you could hold a Koosh ball, wear a certain hat or sit in a designated seat when playing the devil's advocate, " he suggests.

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Sitting in the catbird seat is Nike, which dresses Woods and provides his clubs and ball.

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