短语词组短语block k thrust 块状冲断层thrust block 推力承座;推力轴承;止推座outer thrust block 外止推座inspection of thrust block 推力块厚度检查differential thrust block pin 差速器止推座销thrust block plate 推力承底板;推力轴承底板;推力块座板;止推座板thrust block ring 推力承环 返回 block thrust