HF是 Halogen Free 的缩写，在电子行业中称之为无卤或低卤，主要管控的是氯和溴。 而 RoHS 是Restriction of Hazardous Substances的缩写，是 欧盟 有关电子产品中限制物质的一个指令，目前管控十项物质，属于强制法规。

2019年3月19日 · HF phenotypes were defined as persistent HF r EF ( LVEF ≤40% at baseline and at 1-year follow-up), HF i EF ( LVEF ≤40% at baseline and improved up to 40% at 1-year follow-up), HF with midrange ejection fraction (LVEF between 40% and <50%), and HF with preserved ejection fraction ( LVEF ≥50%).

hf-r是调光的，hf-p是高端型，预热时间只要0.5秒，启动温度可以到零下15摄氏度。 HF-S是中端型号，预热时间要1-1.5秒，启动温度要高于HF-P。 展开

2019年3月8日 · Many patients with heart failure (HF) with reduced ejection fraction (HF r EF) experience improvement or recovery of left ventricular ejection fraction (LVEF). Data on clinical characteristics, outcomes, and medical therapy in patients with HF with improved ejection fraction (HFiEF) are scarce.

HF-R 254 TL5 EII 220-240V 50/60Hz 扁平、超薄、重量轻的高频电子镇流器， 1-10V 的模拟协议，适用于PL-L 荧光灯。 产品数据 操作和电气 输入电压 220 至 240 V 线频率 50 to 60 Hz 输入频率 50 至 60 Hz 对地漏电流（最大） 0.5 mA 侵入电流宽度 0.40 ms 侵入电流峰值（最大） 45 A

h907-hf-r是单组份改性环氧树脂高弹性胶粘剂，广泛应用于各类电子元器件、电工电器、机电五金、磁性元件、光电产品、汽配组件等之粘接固定，对于金属、陶瓷、玻璃、纤维制品及硬质塑胶之间的封装粘接有优异的粘接强度；常温下粘度适中，在高温下具有 ...

HF-R 1 26-42 PL-T/C EII 220-240V 50/60Hz 这款高频电子调光镇流器结构紧凑、轻质的，适用于PL-T 和PL-T 和PL-C 紧凑型荧光灯 产品数据 操作和电气 输入电压 220 至 240 V 线频率 50 to 60 Hz 输入频率 50 至 60 Hz 对地漏电流（最大） 0.5 mA 侵入电流宽度 0.35 ms 侵入电流峰值（最大 ...

Jardiance® (empagliflozin) tablets is proven to reduce the risk of CV death and hHF in adult patients with HF, regardless of LVEF. The median trial period was 16 months in EMPEROR-Reduced. 1. The EMPEROR-Reduced trial evaluated JARDIANCE in a dedicated HFrEF population. 3. Time to first event of CV death or hHF. *Plus-minus values are means ± SD.

High-frequency electronic dimming ballast, using the analog protocol (1-10 V) for TL5 HE/HO and TL5 Eco lamps. The ballast is primarily designed for Indoor application. For outdoor application, the luminaire should be minimum ClassIand need to be sufficiently protected against water & dust.

R grade filter element can be used in variety of applications. For applications not listed please contact us or your local dealer. To calculate the correct capacity of a given filter based on actual operating conditions, multiply the nominal flow capacity by the appropriate correction factor(s).