... 挺杆 tappet 支柱 tappet block 挺杆间隙 tappet clearance ...
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block tappet hole 机体挺柱孔
tappet block
止推块
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The tappet hole of D6114 diesel engine block is machined difficultly and has high design requirement on accuracy.
D6114柴油机机体挺柱孔加工难道大、加工精度要求高。
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