(<= (Model-Id $X Counterweight_Guiderail_Model_M01) (Counterweight_Guiderail_Model_M01 $X)) (<= (Has-Parameter-Slot $X Counterweight_Weight_Limit) (Counterweight_Guiderail_Model_M01 $X)) (<= (Counterweight_Weight_Limit $X 15000) (Counterweight_Guiderail_Model_M01 $X)) (<= (Counterweight_Guiderail_Unit_Weight $X 8) (Counterweight_Guiderail_Model_M01 $X))