Power heads

In recent years, each power head is fitted with a bolt-in precombustion chamber, which allows the engine to bum a very lean mixture, resulting in very bw exhaust emissbns... 

Blank cartridges can produce fatal wounds when fired at, or near, contact, and they work very well in power heads. As with firearm ammunition, blanks can also damage the eardrums when discharged. 

The contractor s model, AV-4POLY, is a compact, easy-to-carry HEPA vacuum, which uses either an electric or pneumatic beater bar assembly. All of our Electric HEPA Vacuums meet the ERA S New RRP (Renovation, Repair and Painting Regulations) 40CFR, Part 745, Subpart E. Supplied standard with an external electric receptacle to operate an optional beater bar power head for use on lead and asbestos abatement projects. Contact Air Systems for more information 1-800-866-8100. Circle 329... 

Canned pumps, used as MCPs in shipboard plants, with a necessary increase in power, head, output and trip ... 

Extraction-clean using portable machine with hose and 12-in agitator power head 1000fE 64.80 min... 

Use an efficient vacuum cleaner with a power head once a week on rugs and floors (twice a week in homes with a crawling child). 

Once a month, vacuum and/or wet-wash surfaces that may be touched (furniture, windowsills, children s toys, and car interiors). Hand vacuum with a power head on plush upholstery. 

This unique volume will increase anyone s command of the English language and build up your word power. Fully cross-referenced, it includes synonyms of every kind (formal or colloquial, idiomatic and figurative) for almost 900 headings. It is a must for writers and utterly fascinating for any English speaker. 

The sinc fiinction describes the best possible case, with often a much stronger frequency dependence of power output delivered at the probe-head. (It should be noted here that other excitation schemes are possible such as adiabatic passage [9] and stochastic excitation [fO] but these are only infrequently applied.) The excitation/recording of the NMR signal is further complicated as the pulse is then fed into the probe circuit which itself has a frequency response. As a result, a broad line will not only experience non-unifonn irradiation but also the intensity detected per spin at different frequency offsets will depend on this probe response, which depends on the quality factor (0. The quality factor is a measure of the sharpness of the resonance of the probe circuit and one definition is the resonance frequency/haltwidth of the resonance response of the circuit (also = a L/R where L is the inductance and R is the probe resistance). Flence, the width of the frequency response decreases as Q increases so that, typically, for a 2 of 100, the haltwidth of the frequency response at 100 MFIz is about 1 MFIz. Flence, direct FT-piilse observation of broad spectral lines becomes impractical with pulse teclmiques for linewidths greater than 200 kFIz. For a great majority of... 

Advantages. The experiment can be readily carried out with a conventional probe-head, although the fastest spiiming and highest RF powers available are usefid. The pulse sequences are relatively easy to set up (compared to DAS and DOR) and the results are usually quite straightforward to interpret in temis of the number of sites and detemiination of the interactions. 

A powerful stirrer, driven by a flexible driving shaft between the motor (I h.p.) and the stirrer, is depicted in Fig. II, 7, 3. The motor may be placed at a distance from the stirrer head and reaction vessel, thus enabling the assembly to be used for inflammable, corrosive or fuming liquids without damage to the motor. Furthermore, any laboratory retort stand and clamp may be used since the stirrer head weighs only about 250 grams. A variable speed control (500-2000 r.p.m.) is provided. 

Pumping, Velocity Head, and Power. Mechanical mixers can be compared with pumps (1) because they produce circulating capacity and velocity head H. The analogy between a pump and mixer can be appreciated by comparing a pumping loop with a mixing tank (Fig. 2). Power input P to a pump is represented by... 

The velocity head JT in a pipe flow is related to Hquid velocity hy H = I Qc The Hquid velocity in a mixing tank is proportional to impeller tip speed 7zND. Therefore, JTin a mixing tank is proportional to The power consumed by a mixer can be obtained by multiplying and H and is given... 

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