② It is better to dry dead trees;
③ There are branches suitable for turning;
④ The length should be appropriate;
⑤ The thickness should be appropriate.
Climbers usually carry knives, saws and other tools with them. If they find this dry jujube tree, they will cut it down quickly.
The production of crutches usually includes the following processes:
(1) Looking for raw materials: The shape of raw materials is very important for making a satisfactory crutch. You can't make a silk purse out of a sow's ear.
(2) Cutting: After finding suitable raw materials on the mountain, cut them properly, leaving suitable parts and lengths, and take them home for subsequent processing. "Long carpenter and short blacksmith", don't be too hard when cutting materials, leave some length appropriately, in case the raw materials are cut short, it will be wasted.
③ Straightening: Natural raw materials are generally curved and cannot be used directly. Bake it with fire, heat it and then straighten it hard.
(4) Peeling: use tools such as knives and percussion to remove bark from the surface of raw materials.
⑤ Molding: Cut, chop and drill the raw materials according to their favorite shapes to make the prototype of crutches.
⑥ Polishing: Use gauze to polish the bark, burr and defects formed by knife cutting on the crutch surface to form a smooth and symmetrical surface.
At this point, the beloved crutch can be used.
⑦ You can also use tung oil or varnish to add a layer of protection to the crutch, which can not only increase the appearance, but also protect the crutch from water, moisture, pollution and acid and alkali erosion. After brushing dry, polish it with fine sandpaper and brush it again, usually 3-5 times.
■ How long is the crutch suitable?
[1] Stand on the flat ground in flat shoes, with your hands drooping naturally and stand at attention, and then measure the distance from the skin stripes on your wrists to the ground. This size is the ideal length of crutches. ■ Is the crutch open or closed?
Seeing the old man leaning on crutches, few people will raise objections. On the contrary, it may be abnormal if someone objects to the old people leaning on crutches.
■ Old friends should keep a word "caution" when treating crutches:
1, if you are not too old and can move freely, try not to use crutches. It is often found that some old people are still in good health and their hands are "full" to pick up crutches. Why is it called "handling"? Because he doesn't need it at all, but he has a "nothing if you don't need it" mentality.
This is a great thing, which may bring two disadvantages:
The first disadvantage comes from psychology: with crutches, there is dependence. Gradually, the vitality of life is poor, but old age comes quickly.
The second disadvantage comes from physiology: I know an old man who didn't use crutches until he was 75. Once he was hit by a bicycle on the road and his right leg began to feel uncomfortable. His daughter bought him a crutch. So, he put all his weight on the crutch, gradually hunched his back to the crutch, and soon became a hunchbacked old man.
Long-lived old people in the mountains seldom rely on crutches because of long-term exercise. In fact, the knowledge of crutches, like medication, lies in the word "careful use". Impartial, impartial; Not eating or taking less medicine is the best policy.
2, the quality of crutches must be good, to prevent cracking in use.
The crutches are mainly hands and should not be supported by other parts of the body. The quality of crutches is worrying. So ask more questions and pick more, and choose the one that is not easy to crack due to moisture.