Have you ever noticed those dark sleepers under the tracks while taking a train? These silent 'railway backbones' have to endure the' stepping on their backs' at a speed of 300 kilometers per hour every day, and also have to endure wind and rain in the open air, living much more tiring than us working people.

When it comes to the "top stream" in the world of sleepers, pine wood is definitely not inferior. It has a natural pine aroma and a texture as straight as a ruler, making it easier to process than cutting tofu. If not treated with anti-corrosion measures, those fungi and pests that exploit every opportunity will treat pine wood like a self-service restaurant.

The newly cut pine logs can have a moisture content of over 50%. So it is necessary to let the pine wood air dry naturally in a well ventilated yard to remove excess moisture.

After natural air drying, the pine wood will undergo a "cosmetic level" transformation. Entering the processing workshop, the roar of the giant sawing machine made people's ears numb. These steel monsters are like hairdressers' pushers, cutting thick logs into standard sized sleeper blanks. But this alone is not enough - in order to double the effectiveness of the subsequent "oil therapy", a scoring machine needs to be used to draw dense "meridians" on the surface of the wood.

These scratches are like the capillaries of the human body, "said Lao Li, the director of the anti-corrosion workshop, holding up a sample." Oil seeps into the interior of the wood through these channels. "I looked closely and found that each scratch was precise to the millimeter level, as if measured with a ruler. Lao Li said with a smile, "Don't underestimate these fine lines. They can triple the antiseptic effect - just like opening the absorption channel for the skin, essence can work."

Now it's time for the highlight - oil immersion treatment. The pillow, which is engraved with "meridians", will be sent into a huge anti-corrosion jar and enjoy a refreshing "oil bath" in a vacuum environment.

First, evacuate the air inside the tank and inject high-temperature and high-pressure anti-corrosion oil, allowing the oil to drill through the scratches and fiber gaps. The most crucial thing is the immersion depth - reaching 13 millimeters or more. This number is not predetermined: experiments have shown that a 13mm permeable layer can provide effective protection without making the wood brittle like cookies.

After undergoing this complete health preservation process, the lifespan of sleepers skyrockets from a few years to over a decade or even decades. Especially in humid areas in the south, the anti-corrosion ability of oil immersed sleepers can be considered outstanding - even when other woods have already rotted into sawdust, they remain as strong as before, and even termites have to take detours when they see them.

Speaking of which, the way of "health preservation" for sleepers may seem traditional, but in reality, it hides high technology. For example, the latest oil immersion control system can adjust oil pressure according to wood density; For example, millimeter scale scoring technology allows oil to penetrate deeper and more evenly - these black technologies give new life to anti-corrosion processes.

From wind and sun exposure to deep oil therapy, from perishability and cracking to solidity and durability, these silent guardians have proven with decades of life that as long as "health preservation" is done properly, wood can also become a legend.

After all, in the railway industry, those who can withstand a speed of 300 kilometers per hour and step on their backs are true health masters! Do you think so?