可以比较的参考数据 Comparable reference data
本站现有资料中，YT27参考重量27 kg、长度668 mm、参考孔径30-45 mm；YT28参考重量26 kg、长度661 mm、参考孔径30-42 mm。耗气量与冲击频率也可作为初筛坐标。 YT27: 27 kg, 668 mm, 30–45 mm reference diameter. YT28: 26 kg, 661 mm, 30–42 mm. Air consumption and impact frequency also support preliminary screening.
参数差异不等于现场表现 Specification differences are not site performance
岩性、孔深、推进、供气、润滑和钎具都会影响作业表现，因此不能只凭一两个数值判断最终效率。 Rock, depth, thrust, air supply, lubrication and tooling all affect operation. One or two figures do not determine final productivity.
下单前核对配套 Verify accessories before ordering
同一型号也可能存在配置或批次差异。 Even the same model may vary by configuration or batch.
- 实际孔径和孔深 Actual hole diameter and depth
- 供气与管路 Air supply and hoses
- 气腿和注油器 Air leg and lubricator
- 钎尾与钎具 Shank and tooling
- 铭牌和出厂配置单 Nameplate and factory configuration list