The seeds of green onions, onions, and leeks are often called three black seeds because they look almost the same. The skin is black and the shapes are similar. It's not easy to distinguish, but when you look closely, there are still differences between the three. Onion seeds are shield-like, angular, slightly flat, with few and neat skin wrinkles, and a shallow umbilicus. The seeds of the onion were shield-like and the skin was slightly irregular and wrinkled. The umbilicus was very deep. The leek seeds are shield-like, and the skin wrinkles are numerous and fine, and the umbilicus has no obvious concavity. In general, the weight of 1000-grain seed of scallion seedlings is 2.9 g, the seed weight of onion seed is 4.6 g, and the seed weight of amaranth is 4.15 g. It is felt by hand to pick it up. The green onion seed is lighter and the onion seed is heavier. The seed coats of these three vegetable seeds are poor in water permeability, water swelling is slow, soaking is required before sowing, and the lifespan of these three kinds of vegetable seeds is short, do not use Chen seeds when planting.
KN95 Masks are anti-virus. KN95 masks are similar to N95 masks, except that one is a Chinese standard and the other is an American standard.
If there are two numbers of 95, it means that the protective ability of this mask is above 95%. That is to say, for tiny substances larger than 0.3 micrometers, the mask has a defensive ability of more than 95%, and it can block tiny substances larger than 0.3 micrometers outside the mask. Viruses and bacteria are generally larger than 0.7 micrometers. Therefore, using a mask such as KN95 can effectively protect against viruses.
KN95
Kn95 Mask,Mouth Mask,N95 Face Mask,Ear-Loop Mouth Mask
BIQIAO MEDICAL TECHNOLOGY(HENAN) CO.,LTD , https://www.medical-technology.net