1, plastic
After the first year, trim the lateral branches that compete with the main branch and the lower branches; in the second and third years, repair the thick competition branches and trim a few lower branches; pruning branches every four years until they form 6 meters. Before the closure of canopy, the dry and young trees of the poplar are young. Before the light conditions in the forest are still good, the pruning or no pruning is less. Try to retain the large canopy to increase the photosynthetic area, but the competition branches must be removed. ) Choose only one; if the leading branch is dead and broken, it should stand on one side instead of the trunk to grow and grow into a new central leadership.
2, pruning
Trim the lower branches of the trunk at a proper time to gradually increase branching points. 1-3 years, a small amount of pruning. For 4-5 years, trim to 1/3 of the height of the tree. After 6 years, the pruning branches reach 1/2-1/3 of the height of the tree until 6 meters. For some trunks are very short, but the tree has grown up, can no longer be cultivated into a single tree, you can also cultivate the main branch of the branch as the main branch, increase the branch year by year, was dry type. After the poplar is closed, the trunk is 8-10 cm thick, and the dying twigs at the lower part of the canopy are removed. The canopy retains a dry height of 2/3, and the upper twigs only have to trim extra-thick branches and card neck branches. The large branch should be divided into two times to avoid excessive wounds. Trimming method. Trim to close to the tree trunk for pruning. The cut must be smooth, and it must not be left to scratch or tear the bark. Shearing can heal in those years; twigs are often erupted at the trimming and excision of the plastic trim, and should be wiped out in time at the end of spring and early summer. When pruning branches, for small branches, fast axe or machete are usually used to close the tree trunk and shave from bottom to top to keep the incisions smooth and tidy and to facilitate wound healing; for thicker branches, saws are preferred. Saw from the bottom up, then saw it from the top down to avoid tearing the bark, causing rough cuts and cracks.
Video door-phone (also known as video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building (residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is that it enables the person indoors to identify the visitor and, if (and only if) they wish, engage in conversation and/or open the door to allow access to the person calling.
The following product is the best-selling and most cost-effective video door phone in our factory,
It adopts a 4.3-inch high-definition screen and an aluminum alloy body, and is equipped with led light. It has night vision function and can clearly monitor the outdoor environment and make video calls with visitors even in the dark; physical button operation, classic design, no Easily leave fingerprints and keep your device clean and tidy. It can be used in multi-apartment systems.
The product parameters of 888QZJ4A are for your reference:
1. 4.3 inch 720 HD display TCP/IP Intercom system
2. Calling, intercom, unlocking, monitoring
3. High quality aluminium alloy frosted panel + physical buttons
4. Digital camera, stable and clear image shooting
5. Night vision and bright light compensation function
6. Full duplex voice intercom, comparable to ordinary telephone intercom
7. Elevator linkage function, connect the security system
8. LINUX system platform architecture, system simplification and stability
9. LPDDR3 1 GB memory, standard EMMC 8 GB storage expandable
10. RJ45 standard ethernet interface all-digital design
11. Low power consumption technology solution, saving energy and long life span
12. Dimension:400*140*51(mm)
13. Install method : Wall/flush install (390*130*46 mm)
14. Image/video advertising playback (advertising can be customized)
15. Door opening:IC/ID card/ password/call the Indoor Monitor or center management machine unlock
We are a factory specializing in the production, manufacture and research and development of video door phones for 11 years. We are located in the beautiful coastal city - Zhuhai. We have our own R&D team, we can provide professional products and services. We have different systems of video door phone for different customers and markets, for example, IP video door phone, 2-wire audio door phone, 4-wire video door phone and wireless doorbell, if you are interested, please feel free to contact me, I can send our catalog to your email.
Multi Video Door Phone,Video Door Phone Intercom System,Video Phone Doorbell,Video Door Calling System
Zhuhai Mingke Electronics Technology Co., Ltd , https://www.zhmkdz-electronics.com