全部

1·Analyzed causation of TK-3 hydraulic vertical shaft coring drilling rig easy to bring hydraulic chuck failure, get stuck with actuating rod etc, put forward two alteration schemes.

根据TK - 3型液压立轴式岩心钻机结构分析产生液压卡盘失灵、主动钻杆卡死等故障的原因，提出了两套改造方案。

2·A throwing part comprises a ball seat, a front push rod, a back push rod, a drive rod, a connecting rod, an actuating cylinder, a support frame, etc.

投掷部分的组成中包括球托、前推杆、后推杆、驱动杆、连杆、驱动气缸、支架等。