(1) Normal sapwood
Chord cut 1. Refers to the part of wood that contains living cells and storage materials in the trees of life.
Chord cut 2. Located on the outside of the trunk.
Chord cut 3. Usually the color is light.
Chord cut 4. It has the functions of transporting sap, mechanical support, and storing nutrients.
String cutting 5. Width has a certain identification value. The wide ones are masson pine (name according to national standard G/T 16734-1997, Latin name is omitted, the same below) 7cm ~ 9cm, 28 rounds; narrow ones such as chestnut 2cm, 2 ~ 5 rounds.
(2) Connotation sapwood
String cutting refers to the appearance and nature of the sapwood contained in the wood in the heartwood. The living cells are no longer present, but the storage materials can still be retained and can be found in the heartwood of cockroaches and cypress.
(3) Normal heartwood
String cutting 1. Refers to the absence of living cells in the trees of life; at the same time, the stored substances (such as starch) are not present or converted into heartwood substances.
Chord cut 2. The material is gradually transformed from sapwood, and the heartwood is formed from 3 years (hedgehog) to more than 30 years (massip pine, ginkgo).
String cutting 3. The color of the material is usually dark.
String cutting 4. No function of guiding and storing. In addition, the term heartwood is usually a commercial term that refers to a person who has a significant color in the heart of the tree.
(4) false heartwood (pseudo heartwood)
Chord cutting 1. There is no difference in the color of the heartwood of some tree species, but the heartwood is deepened due to the infection of fungi, such as poplar (red heartwood), maple (water heartwood) and so on.
Chord cut 2. A person who suffers from a disease such as a disease and becomes darker, called a wound heart.
(5) Tree species with distinct differences in heartwood and sapwood
The string is cut bitter (the heartwood is reddish-brown, the sap is light yellow); the toon is fragrant (the heartwood is reddish brown, the sapwood is yellowish brown to light reddish brown).
(6) Indistinguishable tree species
String cut maple scent light gray; yellow sandalwood color is yellow or gray.
(7) Heart and sapwood are between the above two
The tree species that grow gradually are: jujube (redwood in heartwood, yellowish sapwood); longan (black-brown in heartwood, light reddish-brown in sapwood).
(8) Difference table of heart and sapwood
Heart and sapwood difference
Heartwood
1. Light color
2. The moisture content of broad-leaved treewood is usually higher than that of sapwood. The moisture content of coniferous sapwood is usually higher than that of heartwood.
3. The water content is equal to the sapwood, which is heavier and lighter.
4. When the water content is equal to the sapwood, there is no difference in the strength of the heartwood and sapwood (the mechanical properties of some tree species such as the hedgehog heartwood are stronger than the sapwood, such as the removal of the infiltrated material, there is no significant difference)
5. More resistant to water (pollution of infiltrates)
6. Low permeability (infiltration of five obstacles). Not easy to dry. Good permeability and easy to dry.
7. The main division of the mechanical support role of the main division, storage and support
With the development of science and technology in daily life, technology has made a lot of things very convenient. People rarely need an axe in their daily life. The axe gives people the feeling that it is a tool for cutting wood and defending themselves. But sometimes the function of an axe can not be replaced by other things. Next, let's learn about the knowledge related to multi-functional axes!
The multi-functional axe is a multi-functional rescue hand tool, a portable hand tool integrating the functions of spade, axe, hammer, pry, saw, etc. It is a good rescue helper carried by the military, armed police, fire fighting, disaster relief and rescue personnel. It can carry out rescue work in various special occasions such as fire scene, disaster scene (broken doors, windows, plates and earthquake, collapse, vehicle and other accidents), and can well solve various rescue problems. It is one of the demolition and rescue tools for rescue and relief, and also an essential tool for survival in field activities.
Features of multi-function axe:
1. The multi-function axe is a portable multi-function hand tool It is a multi-functional hand tool integrating axe, pliers, knife and abrasive tools.
2. The full set of tools are packed with a special tool kit (flame retardant material), which can be buckled on the belt and carried with you. It is very convenient to use.
3. The whole set of products are designed with ergonomics, and the structure is compact and reasonable; According to the different occasions of using the tools, select various high-quality steel materials matching them to meet the use effect.
4. Multi functional hand tool, with detachable function, the whole set of tools only share one main handle, and the only handle is used together with other tool heads.
5. The whole set of tools are mostly machined, with high surface roughness, good matching performance, flexible and convenient use, and beautiful appearance.
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