Morphological characteristics

Perennials. Stems strong, base lignified, highly branched, 40-150 cm tall, base nearly 4-angled, upper obtusely 4-angled, shallowly grooved, white pubescent. Leaf ovate to triangular-shaped heart-shaped, 2.5-7 cm long, 2.1-4.7 cm wide, apex obtuse to acute, base heart-shaped to truncate, margin with crenate teeth or teeth, grassy, ​​yellow-green above, was Very short bristles, slightly whitish below, pubescent but densely veined, lateral veins 3-4 pairs, obliquely ascending, slightly dimpled above, bulging below; petiole 0.7--3 cm, thin. The inflorescences are cymbidium-like, the lower part of the axillary, the upper part of a contiguous or discontinuous, relatively loose or very dense terminal branching panicle, the cymules dichotomously branched; temporal-leaflike, or upper ones Small and lanceolate, bracts, small bracts diamond-shaped, small. Calyx calyx tubular, about 6 mm long, 1.2 mm in diam., outer white pubescent, inner surface only hirtellous bristly, teeth conical, 1.5-2 mm long, posterior teeth longer, calyx increased after flowering Cocoon shape, longitudinal ribs are very clear. Corolla white, purple dot on lower lip, outer white pilose, inner surface pubescent at throat, ca. 7.5 mm, crown tube very fine, ca. 0.3 mm, spontaneously expanding into wide throat from crown, crown檐 Two-lipped, upper lip short, ca. 2 mm, width 3 mm, apex shallowly dimpled, lower lip 3-lobed, middle lobe suborbicular, ca. 3 mm, width 4 mm, base cordate, margin with Coarse teeth, lateral lobes lobate. Stamens included, filaments flat, glabrous. Style linear, apex 2-cleft. Disk cup-shaped, lobes apparent. Ovary glabrous. Nutlets ovate, triangular, grayish brown, ca. 1.7 mm long, ca. 1 mm in diam. Flowering from July to September, fruiting from September to October.

荆芥


Marine Valve Parts


The valve stem is an important part of the valve. It is used to drive, connect the actuating mechanism or handle, and directly drive the spool to move or rotate, so as to realize the function of valve switch or regulation.Valve stem in the valve opening and closing process is not only moving parts, stress components, but also seals. At the same time, it is subjected to the impact and corrosion of the medium, and it also causes friction with the packing. Therefore, in selecting the stem material, it must be guaranteed that it has sufficient strength at the prescribed temperature, good impact toughness, scratch resistance, corrosion resistance. The valve stem is a vulnerable part, and the mechanical performance and heat treatment performance of the material should be paid attention to when selecting.The valve stem in the valve opening and closing process, under tension, compression and torsion force, and direct contact with the media, as well as the relative motion between the friction and filler, so in the choice of stem material, must ensure that it provides adequate temperature strength, good impact toughness, abrasion resistance and corrosion resistance of.


Marine Valve Parts,Steel Marine Valve Parts,Marine Valves,Marine Ball Valves,Marine Spare Parts

ZhouShan HeCheng Machinery Co., LTD. , https://www.hcmarineparts.com