According to customer requirements design and production of excavators and three-plus long arm excavator plus the long arm, two-stage lengthening size excavator arm can be extended to (13-26) m, two-stage lengthening size excavator arm is mainly applied to earthwork base and deep graben and remote clearing silt excavating operation; three-lengthening size excavator arm can be extended to (16-32) m, three-lengthening size excavator arm is mainly applied to the dismantling of high-rise buildings and other projects . Plus the long arm of the operating parameters of the two-stage: 13 Mega long arm of parameters: weight of 3 tons, 0.3 square bucket capacity, maximum digging height of 11.3 meters, the largest mining extended range of 12.5 meters and a maximum digging depth of 9.0 m, Height: 2.9 m; 15.38 Mega long arm of parameters: weight of 4 tons, bucket capacity of 0.4 square, maximum digging height of 12.51 m, maximum outreach digging range of 15.1 meters and a maximum digging depth of 11.34 m, Height: 2.98 m; 18 Mega long arm of parameters: weight of 5.2 tons, 0.45 square bucket capacity, maximum digging height of 13.72 meters, the largest mining extended range of 17.6 meters and a maximum digging depth of 1.3 m, Height: 3.21 m; 20 Mega long arm of parameters: weight of 6 tons, bucket capacity of 0.5 square, maximum digging height of 14.92 meters, the largest mining extended range of 19.6 meters and a maximum digging depth of 15.0 m, Height: 3.21 m; 22 Mega long arm parameters: weight of 6.5 tons, 0.6 square bucket capacity, maximum digging height of 16.1 meters, the largest mining extended range of 21.6 meters and a maximum digging depth of 16.5 m, Height: 3.4 m; 24 Mega long arm of parameters: weighs 7 tons, is 0.6 square bucket capacity, maximum digging height of 17.3 meters, the largest mining extended range of 23.6 meters and a maximum digging depth of 18.0 m, Height: 3.4 m; 26 Mega long arm of parameters: weight of 8 ton, bucket capacity of 0.5 square, maximum digging height of 18.5 meters, the largest mining extended range of 25.6 meters and a maximum digging depth of 0.45 m, Height: 3.4 m; excavator plus the long arm, lengthen the size of the main supporting arms and heavy machine configure: 10-16 tonnage plus the long arm excavator customized, extended arm size, can be extended to 13 meters, which is configured to: a bucket, a bucket cylinder, pin six, four high-pressure hose, tube three butter , a connecting rod assembly, has grown up with a good high-pressure hose plus arm (7.1 m) with extended arm (5.9 m) of a group with one to three tons weight; 20-22 tonnage plus the long arm excavator customized, extended size arm can be extended to 15.38 meters, which is configured to: a bucket, a bucket cylinder, pin six, four high-pressure hose, butter tube 103, a connecting rod assembly, has grown up with a good high-pressure hose plus arm (8.22 m) and extended arm (7.16 m) of a group with one to three tons weight; 20-25 tonnage plus the long arm excavator customized, extended the size of the arm can be extended to 18 meters, which is configured to: a bucket , a bucket cylinder, pin six, four high-pressure hose, butter tube 103, a connecting rod assembly, has grown up with a good high-pressure hose plus arm (10 m) with extended arm (8 meters) of each one groups, one to three tons weight; 25-34 tonnage plus the long arm excavator customized, extended arm size, can be extended to 20 meters, which is configured to: a bucket, a bucket cylinder, six pin, high-pressure hose four, butter tube 103, a connecting rod assembly, has grown up with a good high-pressure hose plus arm (11 m) and extended arm (9 meters) of a group with one to three tons weight; 35-40 tonnage custom excavator plus the long arm, extended arm size, can be extended to 22 meters, which is configured to: a bucket, a bucket cylinder, pin six, four high-pressure hose, butter tube 103, a connecting rod assembly, has been with a good High-pressure hose plus grow arm (12 m) and extended arm (10 meters) of a group with one to three tons weight; 40-50 tonnage plus the long arm excavator customized, extended the size of the arm can be extended to 26 meters, its configuration as follows: a bucket, a bucket cylinder, pin six, four high-pressure hose, butter tube 103, a connecting rod assembly, has grown up with a good high-pressure hose plus arm (14 m) and extended arm ( 12 m) of a group with one to three tons weight;