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在1958年大跃进中我们就开始试制菱苦土道木,但由于不能钉道钉的问题没有解决,因而没有推广使用.在“双革”中,我们进行了进一步的研究,在菱苦土道木中间加上木柱,使用道钉即钉在木柱上,这样就解决了钉道钉的问题.采用菱苦土道木可节约大量木材,而且价格便宜,一根12×12×1.2米道木价格为1.56元,而同样规格的菱苦土道木,只0.827元,比木制道木低50%左右(见下表).
In the Great Leap Forward of 1958, we began trial production of R. argentifera, but because the problem of not being able to nail spikes was not solved, we did not promote the use. In “Double Leather”, we conducted further research in the Lingkuang soil. In the middle of the road, wooden pillars are added, and spikes are used to nail the wooden pillars. This solves the problem of nail spikes. The use of Ramsil soil can save a lot of wood, and the price is cheap, a 12×12×1.2. The price of Midaomu is 1.56 yuan, while that of the same specification is only 0.827 yuan, which is about 50% lower than that of wooden roadwood (see the table below).