系列范围 Series scope
本站YT系列包括YT23、YT24、YT27、YT28、YT29A和YT29B，均作为气腿式气动凿岩机候选。型号数字大小不能直接代表效率、寿命或适用岩性。 The range includes YT23, YT24, YT27, YT28, YT29A and YT29B pneumatic air-leg candidates. Model numbers do not directly indicate efficiency, life or rock suitability.
现有资料怎么比较 Comparing available documentation
YT23、YT27、YT28、YT29A和YT29B可比较参考重量、机身长度、孔径、耗气量、冲击频率和钎尾规格；YT24仍有多项需要下单前确认。 Compare weight, body length, diameter, consumption, frequency and shank data for YT23, YT27, YT28, YT29A and YT29B. Several YT24 items still require pre-order confirmation.
从工况缩小候选范围 Narrow the shortlist by conditions
先确定岩性、孔径、孔深、作业方向、现场空间和供气条件，再比较型号与配套。 Establish rock, hole diameter/depth, direction, space and air supply before comparing models and accessories.
- YT23、YT24、YT27
- YT28
- YT29A、YT29B
- 气腿与注油器 Air leg and lubricator
- 供气、钎具和备件 Air supply, tooling and spare parts