Abstract: The invention relates to a drain trench body having base plates (11, 12), between which columns (13) are arranged vertically. The drain trench body comprises side walls (14) which are connected to the base plates (11, 12). The side walls (14) and the base plates (11, 12) have first and second locking elements (15, 16) which are in engagement with each other. The locking elements (15, 16) are movable relative to one another in the height direction along the longitudinal axis of the columns (13). The invention further relates to a center plate (20) for a drain trench body.

Abstract: The invention relates to a trenching unit having at least two trenching bodies (10a, 10b), which each comprise an upper base plate (11), a lower base plate (12), and hollow columns (13a, 13b), which are arranged perpendicularly between the base plates (11, 12) and form column openings (14) in the base plates (11, 12), wherein the lower base plate (11) of the one trenching body (10a) and the upper base plate (12) of the other trenching body (10b) bear on one another in such a way that the column openings (14) of the two bearing base plates (11, 12) are arranged concentrically.

Abstract: The invention relates to a trenching unit having at least two trenching bodies (10a, 10b), which each comprise an upper base plate (11), a lower base plate (12), and hollow columns (13a, 13b), which are arranged perpendicularly between the base plates (11, 12) and form column openings (14) in the base plates (11, 12), wherein the lower base plate (11) of the one trenching body (10a) and the upper base plate (12) of the other trenching body (10b) bear on one another in such a way that the column openings (14) of the two bearing base plates (11, 12) are arranged concentrically.

Abstract: The invention relates to a drain trench body having base plates (11, 12), between which columns (13) are arranged vertically. The drain trench body comprises side walls (14) which are connected to the base plates (11, 12). The side walls (14) and the base plates (11, 12) have first and second locking elements (15, 16) which are in engagement with each other. The locking elements (15, 16) are movable relative to one another in the height direction along the longitudinal axis of the columns (13). The invention further relates to a center plate (20) for a drain trench body.

Abstract: Slotted channels with coverings (10) are known for discharging surface water into a channel. The covering has at least one horizontal sheet-metal portion (13) and two vertical sheet-metal portions (11, 12) which are connected to one another via connection devices and have a slot (14) between one another for discharging liquid, for example surface water, into the channel body. In order to allow a particularly complete discharge of water, it is proposed that the horizontal sheet-metal portion (13) comprises drip devices (15) which are mounted and designed in such a way that water running along on an underside of the horizontal sheet-metal portion (13) drips into the channel body.

Abstract: Slotted channels with coverings (10) are known for discharging surface water into a channel. The covering has at least one horizontal sheet-metal portion (13) and two vertical sheet-metal portions (11, 12) which are connected to one another via connection devices and have a slot (14) between one another for discharging liquid, for example surface water, into the channel body. In order to allow a particularly complete discharge of water, it is proposed that the horizontal sheet-metal portion (13) comprises drip devices (15) which are mounted and designed in such a way that water running along on an underside of the horizontal sheet-metal portion (13) drips into the channel body.

Abstract: The invention relates to a wind turbine rotor blade heating process with a wind turbine rotor blade de-icing system arranged on a rotor blade (11), including modular heating elements (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) driven cyclically, recurring, intermittently and/or continuously, wherein at least one modular heating element (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) is provided with a temperature sensor and/or an electric resistance measuring sensor, with which a continuous measurement of the environment measurement values (U) is carried out and the wind turbine rotor blade de-icing system is activated upon reaching predetermined environmental measurement values (U), wherein upon reaching predetermined environment conditions (U), first, a measurement cycle is started, wherein a modular heating element (210, 211, 212, 213, 214, 220, 221, 222, 223, 230, 231, 232, 24) is driven, of which the temperature profile (f=dt (t)) is measured and compared with a heat