MCMASTER-CARR風(fēng)機(jī)1953K27全球直銷商
MCMASTER-CARR 成立于1901年，是美國工業(yè)品分銷商，擁有超過555,000種產(chǎn)品，包含機(jī)械傳動(dòng)件、緊固件、密封件、管件接頭、電子元器件、流體控制、壓力控制及其它五金配件，其產(chǎn)品廣泛應(yīng)用于航空、化工、食品、醫(yī)療等各個(gè)行業(yè)。公司總部設(shè)立在埃爾姆赫斯特（伊利諾斯州）。

.流量 風(fēng)機(jī)的流量是用出氣流量換算成其進(jìn)氣狀態(tài)的結(jié)果來表示的,通常以m3/h、m3/min表示。但在進(jìn)出口壓比為1.03以下(比如通風(fēng)機(jī)范疇的風(fēng)機(jī))時(shí),通常將出氣風(fēng)量看作為進(jìn)氣流量相同。 流量亦稱為氣體...
2.壓力 為進(jìn)行正常通風(fēng) 需要有克服管道阻力的壓力 風(fēng)機(jī)則必須產(chǎn)生出這種壓力。風(fēng)機(jī)的壓力分為靜壓、動(dòng)壓、全壓三種形式。其中克...
3.功率 風(fēng)機(jī)的原動(dòng)力(通常是電機(jī)或柴油機(jī)等)傳遞給風(fēng)機(jī)軸上的功率為風(fēng)機(jī)的軸功率N...
I haven’t posted in forever, but I was inspired this evening to just document what I have found to be the best approach for perfect hard-boiled eggs. What do I mean by perfect hardboiled eggs? Two things: (1) the yolk is cooked to the hardness I like, and (2) the shell peels off easily without that annoying sticking of egg white to the shell. (For the food nerds out there, my understanding, via an explanation I read in Cooks Illustrated, is that by dropping the eggs into boiling water you cause the membrane surrounding the egg white to bond to the shell allowing for easy peeling. Whereas if you bring cold eggs and water to a boil together, the membrane bonds to the egg white and the shell causing that annoying pocking of the egg white– or something like that.)
  MCMASTER-CARR風(fēng)機(jī)1953K27全球直銷商

Total time from start to finish is about 20 minutes — with only about 2 minutes of actual work time, the rest waiting for water to boil and eggs to cook. We all should have a carton of HBs in the fridge all the time. No excuses not to.
Everyone in the engineering world knows McMaster-Carr, but few people in the DIY world do. McMaster is a privately held company based in Illinois that may be the world’s largest engineering superstore. They have hundreds of thousands of items and in twenty plus years of using them I don’t think I’ve ever experienced a stock out. Remarkable.

They have everything. What do I mean by “everything”? Well, you can buy stainless steel spring wire, storage bins, a work bench, a belt sander, fasteners, and (literally) a kitchen sink.

You wouldn’t want to use McMaster for something you can get at Home Depot, even though they have almost everything Home Depot does, but they fit the bill when you need something a little bit out of the ordinary or you want to use an industrial/commercial product in your personal project.

Here are some nice items I’ve used them for in my projects:

    Copper sheet.
    John Boos “butcherblock” countertops (under “Maple tops”) at $16/sq-ft
    Richlite lab bench material (the predecessor to the oh-so-trendy Paperstone…called “phenolic tops” at McMaster) at $26/sq-ft
    Heavy-duty urethane casters to support a huge rolling shelving unit.
    Acme threaded rod for shelf supports.
    Any manner of weird drill bit or fastener.
    “Speedrail” tubing fittings for railings, etc.

They take credit cards. They ship the same day by UPS.

My workbenches shown here (on the left) have McMaster tops (both butcher block and Richlite).
McMaster-Carr Supply Company is a private supplier of hardware, tools, raw materials, and maintenance equipment and supplies. McMaster maintains a wide variety of mechanical, electrical, plumbing, and utility hardware not usually located from a single source.  
MCMASTER-CARR風(fēng)機(jī)1953K27全球直銷商