wheel bearings are not threaded, the beaing races are smooth as is the axle and hub where the bearings fit
That would depend on whether the engine is a 2-stroke or a 4-stroke. You can determine by looking for an oil filler spout or filler cap on the engine. If it has one, the engine is a 4-stroke and the oil is added through there. If it doesn't have one, the engine is a 2-stroke and 2-cycle oil must be added to the fuel in the recommended ratio.
cardiac output
Rough shaping of wood. It removes a fair amount of material with each stroke, but leaves a coarse surface.
contractility
All natural gas engines are 4 stroke. In a 2 stroke engine the oil is mixed with the gasoline. This is not possible when using natural gas as a fuel.
The two stroke uses the crankcase to transfer intake fuel/air mixture through transfer ports to the top of the cylinder for the compression cycle. The crankcase is separated from the gearbox and hence does not share lubricating oil either through splash or pumped oil lubrication techniques. As such there is no oil passed via the oil rings on the piston for lubrication of the cylinder/piston ring interface or splashed/pumped to the top end bearings, bottom end bearings and main/crank bearings. All lubrication for these friction surfaces/components must be provided by the addition of lubricating oil mixed into the fuel/air mixture.
No. The bore, and stroke determine the cid. And they are different on these two motors. The 454, has a longer stroke.
To determine if they have problems chewing or swallowing food/drink. Many stroke patients get pneumonia due to swallowing issues.
You would need to follow-up with your physician to determine whether you need to go out on disability. If your physician places you on disability, and provides the information to support that, then you may be eligible for disability benefits if you have them. I would contact your physician and let them decide what is best for you.
The idea is to line up the electrical fields of the atoms, and to do that you have to stroke in one direction or the other. However, whether you stroke left to right or right to left doesn't matter.
It depends whether you are talking about repeatedly or single-stroke.
In detail, there can be any number of small differences in stroke, bearing surfaces, diameters, end fittings ASO. But there's no principal difference that will 100% separate a 2-stroke crank from a 4-stroke crank. A 4-stroke is more likely to have an oil pump, and the bearings pressure-lubricated through holes and channels in the crank and a 2-stroke is more likely to get its lubrication through the oil-mixed fuel/air mix being circulated through the crankcase. But you can have splash-lubed 4-strokes and pressure lubed 2-strokes.