Abstract: A noise reduction gas path structure includes a gas path chamber; an acoustically transparent and anti-aeration element in the gas path chamber, the acoustically transparent and anti-aeration element is configured to divide the gas path chamber into a gas flow portion and a sound-absorbing portion; and a sound-absorbing filler in the sound-absorbing portion, the sound-absorbing filler is configured to absorb sound entering the sound-absorbing portion from the gas flow portion through the acoustically transparent and anti-aeration element. A gas path device includes the above noise reduction gas path structure. And a respirator includes the gas path device.

Abstract: A window cleaning robot includes a main body having a base assembly, a housing and a plurality of elastic wiper modules. The elastic wiper module includes an elastic component and a wiper, wherein a first end of the elastic component is coupled to the base assembly and at least one second end is coupled to the wiper. The first end is opposite to the second end and the wiper is leaned against window glass under acting force of the elastic component.

Abstract: The present disclosure relates to an airtightness detection equipment for detecting the airtightness of a pedestal on which a target is mounted, comprising: a sealing device configured to hermetically adhere to the pedestal, forming a sealed space between the sealing device and the pedestal; a vacuum pumping device configured to evacuate the sealed space; a gas detection device configured to detect gas in the sealed space.

Abstract: A starter has a high voltage direct current electric motor, a speed reduction device, a clutch, an output gear and a switch box configured to turn on the electric motor. The output gear is driven by the electric motor via the speed reduction device and the clutch. The starter also has a stationary axle on which the output gear is installed. The electric motor has an output shaft. The speed reduction device has a drive gear fixed to the output shaft and a driven gear meshed with the drive gear, the driven gear being rotatably mounted to the axle via a bushing.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.

Abstract: An adjustable multimode lightfield imaging system. A non-homogeneous filter module is positioned at the aperture plane of the lightfield imaging system and provides the multimode capability. The filter module can be moved relative to the imaging system, thus allowing adjustment of the multimode capability.