该制动销包括第一环形表面和第二环形表面。
The brake pin includes a first annular surface and a second annular surface.
第一元件包括形成在该第一元件中的制动销孔。
The first member includes a brake pin aperture formed therein.
引入第一制动室的第一流体沿第一方向推动制动销。
A first fluid introduced into the first brake chamber will urge the brake pin in a first direction.
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