Abstract: Provided is a hand shower with an automatically returnable side switch handle, hand shower including a hand shower body, a limiting portion, and a switching mechanism. A rotary disc and a water distribution component are configured inside the hand shower body, a notch is formed in a side surface thereof hand shower, and the limiting portion is fixed therein hand shower. The switching mechanism includes a toggle button, a transmission component, and an elastic reset member. The toggle button is movably provided in the notch and is linked with the transmission component, which is driven to move by toggling the toggle button. The transmission component is linked with the rotary disc to drive it to rotate in a forward direction relative to the water distribution component. The elastic reset member is provided in the hand shower body and acts on the transmission component to drive it to drive the toggle button to be reset.

Abstract: An automatic return shower head and a use method thereof are provided. The automatic return shower head comprises a handle, a valve body, a water distribution disc, a switching return assembly and a shower head body configured to be connected with the handle and having a water outlet passage communicating with a water supply passage of the handle. The valve body is provided with water distribution hole(s), fixed to a joint between the shower head body and the handle, and located between the water supply passage and the water outlet passage. The water distribution disc is provided inside the joint and rotates relative to the valve body. The switching return assembly comprises a switching assembly linked with the water distribution disc, a knob provided on a wall surface of the joint and linked with the switching assembly, and a return portion linked with the knob.

Abstract: An exemplary system for delivering annuloplasty implants includes an elongated inner catheter assembly, a manifold attached to the proximal portion of the inner catheter, a steering knob assembly coupled to the manifold, a torquer control knob assembly coupled to the manifold, and a central lead extending from a proximal portion of the torquer control knob assembly to the distal portion of the inner catheter assembly. The manifold is configured to present a medial driver tube, a lateral driver tube, a medial lead, a lateral lead, a medial tether puller and a lateral tether puller to a surgeon. Additional annuloplasty implant instrumentation and methods of use are also disclosed.

Abstract: A method for synthesizing florfenicol comprises the steps of cyclization, selective reduction, fluorination, ring opening, deprotection, acylation, esterification with sulfonic acids, epimerization and hydrolysis. Florfenicol is prepared by successively purifying, selectively reducing, and epimerizing chiral (R)-amino ketones. This improves atom economy, reduces waste water pollution and accordingly reduces costs for treating waste water and pollution to the environment, thus lowering costs and simplifying the process. Furthermore, triethylamine hydrofluoride is used as a fluorinating reagent, resulting in improved safety, because of the use of liquid reaction conditions as compared to gaseous reaction conditions, and reduced corrosion to the reaction equipment.

Abstract: The present invention discloses a new florfenicol synthesizing method. The method synthesizes florfenicol products meeting requirements of the Drug Administration by a series of combinations of cyclization, selective reduction, fluorinated open ring, deprotection and acylation, hydroxyl sulfoacid esterified configuration converting reaction, hydrolysis reaction and the like. The synthesizing method of the present invention utilizing chiral amine closed-ring aziridine three-membered ring uses a physical separation method to repeatedly purify chiral aminoketone of high yield obtaining single R configuration, and uses selective reduction and converts the configuration to obtain florfenicol, greatly improving atom economy, while avoiding waste water pollution caused by the existing process, and greatly reducing costs for treating waste water and reducing pollution to the environment, thus lowering costs and simplifying the process.