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使定量铲垫工艺机械化(MSP)是英国铁路开发风动垫碴机(或称用风动方式向碎石道床吹入石碴的机器)的目的。把平整过的轨道稍稍抬起,通过强行插入道碴中的风管,把细心控制的定量石碴吹入每根轨枕下面。当采
The Quantitative Shovel Pad Process Mechanization (MSP) is the purpose of the UK railroad to develop a pneumatic ballast, or a machine that uses air to blow ballast into a ballast bed. Slightly lift the flat track and blow carefully controlled quantitative ballast under each tie by forcibly inserting the duct in the ballast. When mining