Shrimp ridge is a genus of Calanthe, and the English name is CommonCalanthe. There are more than 100 species of this genus. Because the Shrimp Ridge is too elegant compared with the orchids such as Catalan and Dendrobium, and it is too abrupt compared with Chunlan, Lanlan and other national orchids, it has not received much attention for quite a long time. However, although the individual flowers of the Shrimp Ridge are very small and have no bright colors, the small flower shape looks like a small shrimp. The whole inflorescence is superimposed with some fun, and the appreciation value is not low. Shrimp Ridge is warm and humid and sunny. It is more cold-resistant, semi-yin-resistant, not resistant to drought and high temperature, and should be cool in summer. It requires loose and fertile and well-drained humus soil or peat moss soil, which is generally distributed in the growing areas of the country. Shape-shaped feature Stalks of Shrimp Ridge are not obvious, only short rhizomes; several leaves, large, near basal, usually 3, inverted lanceolate narrow elliptical, 15-20 cm long, 3-6 cm wide, with handle The base is clasped. The deciduous varieties turn black and fall off after the leaves are dry in winter; the flower buds are drawn from the side of the leaf stalk or stem base, the flowers are medium in size, and the lower part of the lip and the whole or part of the stalk form a tubular shape with a base. The flower stem is 20 to 50 cm long; the raceme is 10 or so, and the perianth is light brown. The lips are lavender to reddish purple or white, fan-shaped, with 3 deep splits, and the middle splits split into 2, with long distances. A single individual flower has an everted lip, which is shaped like a small shrimp tail. Variety and distribution Shrimp ridges are mostly native, with a few epiphytic species, widely distributed in certain islands from South Africa, Madagascar, China, the Korean Peninsula, Japan, the Himalayas to Indonesia, Australia and the South Pacific. Only one species is far from the center and distributed to the tropical regions of Central America. There are more than 40 species in China, and the Yangtze River Basin and the southern provinces are distributed. According to the biological characteristics of porphyra sinensis, it is usually divided into two large groups: one group is evergreen, its leaves are evergreen, and the globular pseudobulbs are small; the other group is deciduous, its pseudo bulbs are larger, or More or less angular, autumn leaves. There are many varieties of shrimp spine, mainly varieties of stalked stalks: yellowish white, aromatic, produced in Sichuan, Hubei and other places. Silver band shrimp ridge: peduncle and ovary yellow green, about 3cm long, flower open The bracts and petals are somewhat reflexed, yellow-green, produced in northern Guangdong, southwestern Guangxi, southwestern Guizhou and southeastern Yunnan; long-distance shrimp spine: yellow flowers, produced in western Hubei, Sichuan, Yunnan; Lan: The color is pure white, produced in Guangdong, Guangxi, Fujian; long-distance shrimp ridge orchid: flower rose red, produced in Guangdong, Guangxi, Fujian, Taiwan; Medog shrimp ridge orchid: flower lavender, produced in southeastern Tibet. The cultivation of Shrimp Ridge is very close to Guolan in general cultivation techniques. The climate is warm and humid, and it is not allowed to let the sun shine directly. It is best to use 70% of the shade. It is suitable for loose soil with good humus and good drainage. It can also be mixed with common garden soil and humus soil, adding appropriate amount of bone powder or hoof. Corner scraps are used as base fertilizer. Indoor cultivation should not be watered frequently. Can be planted or potted under the open forest. The planting depth is generally 3 to 5 cm, ensuring that the pseudo bulb can be completely buried in the soil. When planting, choose the fake bulbs that were born with the buds in the same year and cut them into small pieces. Each piece needs to have 1 or 2 buds. The buds are triangularly staggered at the opposite sides and lie flat in the basin. Shrimp ridge orchids are fertilized once a month, and when the stems are extracted from the leaves, 1 or 2 times of phosphorus and potassium fertilizers are added. Stop watering after falling leaves in winter. The soil must be kept moist during the growing season, but it should be slightly dry during the flowering period from March to May; the cultivation area should be kept moist frequently, and watered in time. Water is poured once in the morning and evening from July to September. Shrimp Ridge is afraid of cockroaches. In the rainy season or after each heavy rain, it is necessary to remove excess water in time to avoid roots. From May to August, the fertilizer can be applied once every half month, the concentration is not more than 0.5%; after the flower is changed, the basin is changed once every 2 to 3 years, and the minimum temperature in winter should be maintained above 0 °C, and the basin is controlled. The soil is moist. Compared to the common national orchid, almost all cultivated shrimp ridges prefer strong light. In the northern region, the spring, summer and autumn seasons can be cultivated under the shade of a forest or under a shade of about 50%. In the Yangtze River basin, it can be planted under the sparse forest or under the forest edge and the garden tree. The evergreen species of Shrimp Ridge requires a slightly shaded environment compared to deciduous species, but it can also be shaded in winter greenhouses. stainless steel commercial flat washers are used under bolt heads or nuts to increase the bearing surface area, or to offer protection so that the nut or bolt can be rotated without distortion of the bearing surface. Flat washers are also used to give tightness to a joint, to prevent leakage, and especially to distribute pressure under the head of a bolt or nut. Dimensional specifications are governed by ASME B18.21.1. Commercial flat washers generally have a larger outer diameter than SAE (Society of Automotive Engineers) flat washers, and can be utilized in nearly any application. stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resist ance, such as chemical and food processing equipment. Stainless steel has a higher corrosion resistance than carbon steel. 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