Every pregnant woman knows that during the pregnancy test will be arranged B-the inspection link. While most pregnant women have also heard the B ultrasound will affect the health of the fetus, so do B-when embarrassed mood. Well, do B-ultrasound will not affect fetal health? What should I pay attention to while doing B-mode?
B ultrasound is to monitor fetal development by ultrasound, pregnant women and doctors can accurately understand the fetal development is healthy, whether it meets the health status of the time period. However, due to ultrasound B ultrasound, many pregnant women will be worried about this test will adversely affect the fetus, so refuse this test, which can not be timely understanding of fetal development.
Throughout pregnancy, regular birth control will require three B-ultrasound, respectively, 18-30 weeks of pregnancy, 28-30 weeks of pregnancy and 37-40 weeks of pregnancy. The first B-ultrasound is to understand whether the fetus is single or multiple births. The second B-for the row of abnormal examination. The third B-ultrasound assessment before delivery. If in accordance with the normal procedures and the number of B-, it will not adversely affect the fetus. However, if B-premature or every time is too long, it is likely to endanger the health of the fetus. Therefore, do B-time, we must strictly follow the guidance of a doctor, should not be free to do checks.
So, pregnant women do B-when you need to pay attention to what matters?
Do not just do B-
There are many pregnant women want to understand the gender of the fetus as soon as possible, or feel unwell, so volunteered to do B-, this approach is wrong, free to do B-will seriously affect the health of pregnant women and fetuses.
B-time can not be too long
Each B-ultrasound time to be controlled within 20 minutes, especially in the case of pregnant women and other physical discomfort, B-time to be shorter.
The operation should be correct
When pregnant women do B-regular must choose the regular hospital for formal operation, if the probe for a long time to stay in the same position, then there may be harm to fetal brain development.
B ahead to avoid eating flatulence food
Pregnant women do B ahead, be careful not to eat easily lead to flatulence food, otherwise it will affect the ultrasound penetration, resulting in B ultrasound images do not please.
Do B-ahead to understand the situation
Pregnant women to do before B ultrasound to understand the relevant issues, such as the need for holding back urine, etc., otherwise it will delay the test or increase the number of tests, leading to affect fetal health.
Relaxation
Pregnant women do B overtime, should try to relax attitude, and actively cooperate with the doctor's work, so as not to affect the inspection results. Therefore, according to the normal time, the normal frequency of B-ultrasound for pregnant women and pregnant women is safe, and B- can intuitively understand the development of the fetus so that doctors give the correct advice and guidance. In the photo B ahead, pregnant women should understand the B-related issues, to avoid eating foods that cause flatulence and need to relax, under the guidance of a doctor for the correct B-ultrasound. Must not listen to rumors, that B-ultrasound affect fetal health and refuse this test, thus affecting their own and fetal health monitoring.
Collector Nozzle
Refractory nozzles including a so-called long nozzle, an upper nozzle, a lower nozzle, and an immersion nozzle made from high-alumina refractory material, graphite powder, silica powder and other minor constitutents wherein a major part of the high-alumina refractory material is thermospherized particles of about 0.3 to 3.0 mm in diameter which have good spalling and corrosion resistance. Revolving and rolling ability of the thermospherized particles gives far-reaching capability of pressing force deep into the nozzle center portion during shape-forming by a compaction press. Hence more uniform products can be obtained, and a less expensive unidirectional compaction process can be used instead of a high غير مجاز مي باشدt isostatic process for compaction.
The upper nozzle brick is directly installed in the ladle nozzle seat brick. When the molten steel flows through the upper nozzle under high temperature, the chemical erosion and erosion of molten steel and molten slag and the mechanical damage caused during installation make the upper nozzle require long life, resistance to molten steel and slag erosion. , Scouring. Aluminum and carbon are commonly used in domestic water outlet bricks, and their service life is related to factors such as steel grade, amount of steel passing and casting time. There are many CaO-C nozzle bricks used abroad. The bricks are formed by isostatic pressing, and the apparent porosity of CaO sand is required to be <5%. Compared with the original Al2O3-C quality nozzle, the CaO-C quality nozzle is characterized by no blockage, no cracks, and 30% melting loss rate in use, while the Al2O3-C quality nozzle has no cracks but The blockage is more serious, and the melting loss rate is 3.3%.
Collector Nozzle,Fix Nozzle,Upper Nozzle,Long Nozzle
JINAN NEW EMEI CO,LTD. , https://www.emrefractory.com
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