Abstract: An attachment for an engineering vehicle that has a first side having an outer surface, an inner surface, and a first plurality of surfaces extending between the outer surface and the inner surface defining a first plurality of holes having a hole diameter; a second side having an outer surface, an inner surface, and a second plurality of surfaces extending between the outer surface and the inner surface defining a second plurality of holes having the hole diameter; and a plurality of rods occupying at least some of the first plurality of holes and at least some of the second plurality of holes, each rod having a first end, a second end, a longitudinal axis intersecting the first end and the second end, a rod length between the first end and the second end along the longitudinal axis, and a rod diameter.

Abstract: An attachment for an engineering vehicle that has a first side having an outer surface, an inner surface, and a first plurality of surfaces extending between the outer surface and the inner surface defining a first plurality of holes having a hole diameter; a second side having an outer surface, an inner surface, and a second plurality of surfaces extending between the outer surface and the inner surface defining a second plurality of holes having the hole diameter; and a plurality of rods occupying at least some of the first plurality of holes and at least some of the second plurality of holes, each rod having a first end, a second end, a longitudinal axis intersecting the first end and the second end, a rod length between the first end and the second end along the longitudinal axis, and a rod diameter.

Abstract: A garbage separation and recovery machine for beach cleaning that has mobility and can perform a garbage separation and recovery work according to the situation is provided. The garbage separation and recovery machine has a drum type sieve body (54) that is freely rotatably secured to a vehicle body frame (51) towed by a vehicle, a driving gear (92) that is freely rotatably supported by the vehicle body frame (51) and secured to an axle (52) to which right and left wheels are secured, and a mechanism portion (91) for transmitting the driving force of the driving gear (92) to the drum type sieve body (54). The mechanism portion (91) has a gear switching mechanism (95) for performing a switching operation between an automatic rotation mode in which the drum type sieve body (54) is rotated by the rotational force of the wheels (53) and a manual rotation mode in which the drum type sieve body (54) is released from the rotational force of the wheel (53) and allowed to be manually freely rotatable.