优质密封圈 (优质弹性材料) | 低质密封圈 (不够密封,渗漏) |
---|---|
精密螺纹盖 | 粗糙螺纹盖 |
高性能过滤介质:
稳定持续燃料供应 | 劣质的过滤介质:
不稳定间歇燃料供应 |
压力处理和防腐外壳 | 质差且薄的保护外壳 过滤破裂危险 |
优质的排水阀 | 劣质的排水阀 |
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