Abstract: Provided is a cleaning composition contained in an aerosol spray can, methods of making and using the cleaning composition, which comprises: a liquid cleaning mixture, comprising: a) a solvent selected from the group consisting of isohexane, isoheptane, and n-heptane and mixtures thereof; b) a de-aromatized hydrocarbon solvent having 7 to 8 carbon atoms in its molecule; c) a branched aliphatic alkane having 10 to 11 carbon atoms; d) from 5 to 15 parts by weight of ethanol, e) from 1 to 15 parts by weight of isopropanol, f) from 1 to 10 parts by weight of acetone, and g) from 0.01 to 0.2 parts by weight of iso-tridecanol polyoxyethylene ether having a HLB value of 12 to 13, and a gas propellant.

Abstract: The present invention provides a foamable cleaning agent for an air intake system, comprising: a) 6 to 10 wt. % of ?-sulfo-fatty acid methyl ester salt and/or alpha-olefin sulfonate; b) 6 to 10 wt. % of alkyl polyglucoside APG2000; c) 1.5 to 2.5 wt. % of coconut oil fatty acid diethanolamide and/or lauric diethanol amide LDEA; and d) 5 to 15 wt. % of water; based on the total weight of the foamable cleaning agent, also provided are an aerosol product comprising: an aerosol can containing the foamable cleaning agent, and a spraying device, through which the foamable cleaning agent can be sprayed out as a foam; and a method for preparing the aerosol product, a method of cleaning air intake system with the aerosol product, and a use of the foamable cleaning agent or the aerosol product for cleaning air intake system.

Abstract: A foldable flexible screen terminal includes: at least two screen terminal portions and a rollable flexible member, two adjacent screen terminal portions being connected by the rollable flexible member, the rollable flexible member including a plurality of flexible member units and a plurality of bellows structures, each of the plurality of bellows structures being foldable and unfoldable, the plurality of bellows structures including a plurality of first bellows structures, and two adjacent flexible member units being connected by one of the plurality of first bellows structures.

Abstract: A foldable flexible screen terminal includes: at least two screen terminal portions and a rollable flexible member, two adjacent screen terminal portions being connected by the rollable flexible member, the rollable flexible member including a plurality of flexible member units and a plurality of bellows structures, each of the plurality of bellows structures being foldable and unfoldable, the plurality of bellows structures including a plurality of first bellows structures, and two adjacent flexible member units being connected by one of the plurality of first bellows structures.

Abstract: The disclosure belongs to the field of tunnel construction technologies, and more particularly, relates to a construction method for making a water-rich sand layer shield over cross an existing line and underneath cross a sewage push pipe at a close range. The method specifically includes the following steps of: S1) before construction, using MIDAS GTS NX software and FLAC3D to optimize a tunneling scheme antecedently by numerical simulation to determine a part of unfavourable stress; S2) tunneling a test section, the test section being a stratum crossing a front shield direction by 45 m to 60 m; and S3) performing shield crossing construction, wherein a shield crossing construction process includes the steps of: 1) controlling a soil pressure; 2) controlling a shield thrust; 3) performing synchronous grouting; 4) performing a ballasting measure in a tunnel; and 5) performing automatic monitoring in the tunnel.