Abstract: A trencher includes a trencher body; a cable detection mechanism disposed at a front portion of the trencher body; a chain mechanism and a jet mechanism disposed in the center of a bottom portion of the trencher body; a first track mechanism and a second track mechanism, the first track mechanism being disposed on a first side of the bottom portion of the trencher body, and the second track mechanism being disposed on a second side of the bottom portion of the trencher body; and a soil discharging component disposed at a rear portion of the trencher body.

Abstract: A trencher includes a trencher body; a cable detection mechanism disposed at a front portion of the trencher body; a chain mechanism and a jet mechanism disposed in the center of a bottom portion of the trencher body; a first track mechanism and a second track mechanism, the first track mechanism being disposed on a first side of the bottom portion of the trencher body, and the second track mechanism being disposed on a second side of the bottom portion of the trencher body; and a soil discharging component disposed at a rear portion of the trencher body.

Abstract: The present invention relates to a reaction or separation device, wherein the materials circularly flow in a container and a pipe. Said device contains a container and an external circular pipe, wherein the container is a double-chamber structure. The inner chamber consists of an outer cylinder and an inner cylinder with the latter being jacketed by the former, and there is a space between the walls of the outer cylinder and the inner cylinder. The lower end of the outer cylinder is open and higher than the bottom of the container, and the outer cylinder is fixed to the wall or bottom of the container. The upper end of the inner cylinder is open and its lower end connects with the external circular pipe through the feed outlet.

Abstract: The present invention relates to a reaction or separation device, wherein the materials circularly flow in a container and a pipe. Said device contains a container and an external circular pipe, wherein the container is a double-chamber structure. The inner chamber consists of an outer cylinder and an inner cylinder with the latter being jacketed by the former, and there is a space between the walls of the outer cylinder and the inner cylinder. The lower end of the outer cylinder is open and higher than the bottom of the container, and the outer cylinder is fixed to the wall or bottom of the container. The upper end of the inner cylinder is open and its lower end connects with the external circular pipe through the feed outlet.

Abstract: The present invention discloses an underwater building unit and its installation and application methods. It includes a caisson with both ends open and is composed of two rows of box boards being not intersected with each other. Each row of box boards consists of a set of stake-plate body combinations and the bind members between every two adjacent stake-plate body combinations. A positioning beam is located on the top of the box boards and connects the two box boards. There is a cross rib at the middle part of the outer surface of each bind member. The open caisson is made up of small components of low weight. So it is easy for installation and could be extended unlimitedly as required. In addition, the underwater building unit has low underwater condition requirement and is relatively stable, thus the underwater building is quite firm and has a long life. Each component of the open caisson can be industrially manufactured on land so as to lower the cost and free of the influence of stormy waves.

Abstract: The present invention discloses an underwater building unit and its installation and application methods. It includes a caisson with both ends open and is composed of two rows of box boards being not intersected with each other. Each row of box boards consists of a set of stake-plate body combinations and the bind members between every two adjacent stake-plate body combinations. A positioning beam is located on the top of the box boards and connects the two box boards. There is a cross rib at the middle part of the outer surface of each bind member. The open caisson is made up of small components of low weight. So it is easy for installation and could be extended unlimitedly as required. In addition, the underwater building unit has low underwater condition requirement and is relatively stable, thus the underwater building is quite firm and has a long life. Each component of the open caisson can be industrially manufactured on land so as to lower the cost and free of the influence of stormy waves.