... and backward to make the piston which is located in the cylinder do reciprocating movement, so as to occur the negative pressure in the preceding chest of the cylinder. All adopt compressed air as the control, so they are quite suitable for the use in the
... and backward to make the piston which is located in the cylinder do reciprocating movement, so as to occur the negative pressure in the preceding chest of the cylinder. All adopt compressed air as the control, so they are quite suitable for the use in the more
