crackag,chinacrackag

Address: SHIMA ROAD,LOU

XING DISTRICT,LOUDI,HUNAN

PROVINCE,P.R.CHINA 417000

Phone: 0086-738-8261060

Fax: 0086-738-8261062

Mobile : 0086-13707380851

Email: lsj988@188.com

Reliever holes are necessary when trench is deep

d	38-51 mm
d	1 1/2"-2"
L	30-60 cm
L	1'-2'
D	1-1.8 m
D	3'-6'
	45°-60°

Repeat the same procedure for deeper case

d	38-51 mm
	1 1/2"-2'
L 1	40-60 cm
	1'4"-2'
L 2	30-40 cm
	1'-1'4"
D	1-1.8 m
	3'-6'

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